Identify the part of speech of the given word.
Moderate fasting is good for health, so testify the medical experts.

Correct option is B

Correct answer: (b) Verb
Explanation (in detail):
• The word “testify” means to state/prove/confirm as true (Hindi: गवाही देना / प्रमाणित करना / पुष्टि करना).
• In the sentence, “so testify the medical experts” is an inverted structure meaning: “the medical experts testify so.”
• Since “testify” shows an action, it is a verb.
Example: The witness testified in court.
Hence, option (b) is the correct answer.