To answer this question, let's first understand what the PAD INDEX option is in the context of index creation.
When an index is created on a table in a database management system, the PAD INDEX option determines the amount of space that is reserved for each index entry. This reserved space is used to accommodate future growth in the index.
Now, let's go through each option to determine the default value of the PAD INDEX option:
Option A) ON - This option is incorrect because the default value of the PAD INDEX option is not "ON".
Option B) OFF - This option is correct. The default value of the PAD INDEX option is "OFF". This means that no extra space is reserved for each index entry.
Option C) NULL - This option is incorrect. The default value of the PAD INDEX option is not "NULL".
Option D) None of the options - This option is incorrect. The correct answer is option B, "OFF".
Therefore, the correct answer is option B. The default value of the PAD INDEX option in index creation is "OFF", meaning no extra space is reserved for each index entry.