Preparation of the profit and loss account cannot be prepared through the information assembled through the single entry system. This means that this system cannot help the organization to determine its financial position because there is no provision to make adjustments.

On the other hand, the double entry system of recording financial transactions of the organization is useful in the preparation of trading profit and loss accounts as adjustments are made at the time of preparing final accounts.

In single entry system, incomplete records are maintained while in double entry system complete recording of transactions is there. In single entry system comparison between two accounting periods is very difficult.

The dual aspect concept states that every business transaction requires recordation in two different accounts. This concept is the basis of double entry accounting, which is required by all accounting frameworks in order to produce reliable financial statements.

A single entry book-keeping system or single-entry accounting system is a method of bookkeeping relying on a one sided accounting entry to maintain financial information.

In single entry system following things are prepared:

1. Cash book - to record all cash transaction

2. Customer's book - to record balances of debtors

3. Day Books - in which all day to day transactions or activities are recorded

4. Statement of profit and loss to arrive at profit or loss.

5. Statement of affairs to arrive at closing capital at the year end.

As Profit or loss under single entry system is ascertained by the difference between Closing and Opening Capitals it make convenient for small traders to follow single entry system due to following features:
a) Hassle free
b) no need for maintaining books of accounts
c) special knowledge of double entry system is not required.

Suppose Opening Capital (i.e capital on the 1st day of financial year) is Rs. 50,000 and Closing Capital ( i.e capital on the last day of financial year ) is Rs. 70,000. the resulting difference is more by Rs. 20000 indicating a positive increment in capital called Profit.

Normally Single entry system is maintained by small traders as it do not require special set of book-keeping and expert accounting knowledge. Hence, it becomes hassle free for traders to ascertain their profit of loss earned by the business through single entry system.

A system were Profit or loss earned by the business  is based on the difference between its Opening and closing capital. is called Single entry system
In order to find the  capitals , Statement of affairs are prepared which are based on an equation Capital = Assets - Liabilities
Hence, basic accounting aspects of debit and credit are not followed.

Under Single entry System only personal accounts and cash A/c are opened. 

Under single entry system Books of accounts are not maintained hence, Trial Balance is not Possible to Prepare.

Profit or loss earned by the business under single entry system is based on the difference between its Opening and closing capital.
To ascertain this capital Statement of affairs are prepared.

Single Entry System of Accounting, also known as Accounting from Incomplete Records, is a non-standard and non-scientific system of accounting. This system is adopted by small businessmen as they do not have enough capital and expertise to employ the standard double entry system of accounting in their business.

Sole proprietorship is type of enterprise that is owned and run by one natural person and in which there is no legal distinction between the owner and business entity. The owner is in direct control of all elements and is legally accountable for the finances of such business and this may include debt, loans, loss, etc.

For a Sole Proprietor, income tax is not an expense incurred to generate revenue hence it is not treated as an expense to be paid out of profits. In this case, income tax is treated as a personal expense resulting in drawings from the business concluding to a reduction of capital.

Bookkeeping enables the small business owner to support expenditures made for the business in order to claim all available tax credits and deductions. It also provides detailed, accurate, and timely records that can prove invaluable to management decision-making, or in the event of an audit.

Double Entry System of accounting is based on the dual aspect of accounting. It says that every transaction will have two effects in books of account.

"The specific technique which reflects the concept of duality is known as double entry book-keeping."-Lewis and Gillespie.

Because every business transaction affects at least two accounts, our accounting system is known as a double-entry system.  For example, when a company borrows $1,000 from a bank, the transaction will affect the company's Cash account and the company's Notes Payable account.

 Double-entry bookkeeping, in accounting, is a system of bookkeeping so named because every entry to an account requires a corresponding and opposite entry to a different account. The double-entry has two equal and corresponding sides known as debit and credit. The left-hand side is debit and right-hand side is credit.

Because every business transaction affects at least two accounts, our accounting system is known as a double-entry system. 

For example, when a company borrows $1,000 from a bank, the transaction will affect the company's Cash account and the company's Notes Payable account.

The system of recording transactions based on dual aspect is called as double entry system.

The double-entry system of accounting or bookkeeping means that for every business transaction, amounts must be recorded in a minimum of two accounts. The double-entry system also requires that for all transactions, the amounts entered as debits must be equal to the amounts entered as credits.

The matching concept involves that the revenue earned in an accounting year is matched with the expenses incurred during the same period to generate that revenue.

The dual aspect concept indicates that each transaction made by a business needs to be recorded in two separate accounts.

Whenever a transaction occurs there is a two-sided effect, one is credit and the other is debit for a similar amount.

In double account, all business transactions are recorded as having dual aspect.

 The double entry system of bookkeeping is based on the fact that every transaction has two parts and that this will therefore affect two ledger accounts. Every transaction involves a debit entry in one account and a credit entry in another account.

On the other hand, the double entry system is based on scientific principles and is, therefore, used by most of the business houses. 

The system recognizes the fact that every transaction has two aspects and records both aspects of each and every transaction.

Companies Act, 2013 requires every company to keep and maintain at its registered head office books of accounts and relevant documents and the financial statements for each FY (financial year) that provides a true and fair picture of the company's state of affairs which includes its branch offices and other offices.

Real account is an record of an asset. An asset can be current asset such as cash, a fixed asset such as building and intangible asset such as goodwill. Real account relate to the assets & liabilities of a business.

Since the Liability shows credit balance as per the accounting equation. When a liability is reduced or decreased, it is recorded on the debit side of the liability account.

Option C is correct.