In the given question, a sentence is given below with blank(s) to be filled in with an appropriate word(s). Four alternatives are suggested. Choose the correct alternative out of the four.
Only people who are afraid to sign their names send ________ letters.

Correct option is A

The correct option to fill in the blank is (a) anonymous.
People who are afraid to sign their names send anonymous letters. This means letters where the sender's identity is hidden.
· Anonymous – (गुमनाम) Without any name or identity disclosed; from an unknown source.
Example:
· She received an anonymous letter that warned her about the issue.
Meanings of other options:
· Unanimous: (एकमत) When everyone in a group agrees on a decision. E.g., The decision was unanimous .
· Official: (आधिकारिक) Something formal, approved, or related to authority. E.g., It was an official statement from the company.
· Informal: (अनौपचारिक) Casual, not following strict rules or formalities. E.g., They had an informal meeting at the café.