Credulous or gullible is a person that believes whatever others say.

Option 3 is the correct usage. It is an interrogative case, so (?) is needed. Moreover, reported speech needs to be inserted in inverted commas.

A person who leaves his country to settle in another is known as an emmigrant. On contrary, a foreigner in other country is known as immigrant.

Dictionary follows alphabetic order. The first three letters of all the options are same. It is the fourth letter i.e. 'c' that here makes a difference.

She, not I am responsible.

Case of prepositional usage. Verb 'preside' is followed preposition 'over'. It means 'to be in control of the order and procedures of a meeting or ceremony'.

Option 4 i.e. 'Inflammatory' is the right option. It means 'rousing or likely to rouse excitement, anger, violence'.

Case of prepositional usage. We often find inssane people lying 'on' or 'along' the road. So, preposition 'on' is the right choice here.

Opiton 1 is the right choice as 'ultra vires' means 'beyond the legal power or authority of a person, corporation, etc'.

Option 3 i.e. 'Incorrigible' is the right choice. It means 'not corrigible; that cannot be corrected, improved, or reformed'.

Pedant means a person who puts unnecessary stress on minor or trivial points of learning, displaying a scholarship lacking in judgment or sense of proportion. Thus, option 1 is the right choice.

Option 3 is the right choice. 'Five hundred rupees' is a singular noun, thus, needs to be followed by 'is' (singular auxilary). Article 'a' is also needed here.

Circa is a latin word that means approximately in the English language, usually referring to a date. So, option 3 i.e. 'about' is nearest to its meaning.

Corrigendum means an error to be corrected, esp. one in a printed work or a list of such errors with their corrections, inserted in the published work.

Demolish means to pull down, tear down, or smash to pieces (a building, etc.), to destroy; ruin; bring to naught. Erect means to raise or construct (a building, etc.).

Vis-a-vis means one who, or that which, is face to face with another; esp., one who faces another in dancing.

Meager means thin; lean; emaciated; or of poor quality or small amount; not full or rich; inadequate. Ample means large in size, extent, scope, etc.; spacious; roomy; more than enough; abundant.

Jealousy means 'resentfully suspicious of a rival or a rival's influence'.

Case of subject identification and verb relation. Words like 'along with', 'together with', 'with', etc relates to the first subject. As the first subject here (i.e. the chief minister) is singular noun, so the auxilary needs to be singular. Thus, option 3.

Zeal means intense enthusiasm, as in working for a cause; ardent endeavor or devotion; ardor; fervor. Except 'distress' all the other options mean the same. Distress means to cause sorrow, misery, or suffering to; pain.

To fill the blank, we need a verb rather than the verb of being. 'Escaped' is not the right option because it means to avoid an illness, accident, pain, etc. Saved means to protect or to defend, and it rightly explains the intention of the sentence.

In such case, we use the same auxilary but the opposite connotation. So, 'do' is required here, which needs to be followed by 'not'.

This is a case of past indefinite tense. 'Said' (past of say) needs to be followed by a past auxilary. So, 'was' is the best option.

Case of auxilary usage. News is a singular noun and is to be followed by a singular auxilary. 'Does' is the right choice here. 'Has' is not the right option as we know that 'has/have' are followed by third form of the verb, which is not used here.

Case of present perfect continuous tense. Here, a duration or period of time is mentioned for the time that has begun in the past and is still in action. In such cases, preposition 'for' is used. 'Since' is used in case of 'point of time'.