Identify the clause of the highlighted part in the given sentence.
He may relax when he finishes his work.

Correct option is A

The correct answer is (a) Adverb Clause.
Detailed Explanation (English):
• The highlighted part “when he finishes his work” begins with the subordinating conjunction when.
• It tells time (i.e., the time at which he may relax).
• A clause that modifies the verb by answering questions like when, where, why, how, to what extent is called an Adverb Clause.
• Here it modifies the verb phrase “may relax” by answering when he may relax.
Grammatical Rule Used (English):
• Adverb Clause modifies the verb of the main clause and answers: when/where/why/how.
• “when” introduces an adverb clause of time.
Grammatical Rule Used (Hindi):
• जो उपवाक्य (subordinate clause) मुख्य क्रिया (main verb) के बारे में समय/स्थान/कारण/रीति बताता है, वह Adverb Clause कहलाता है।
• “when” समय बताता है, इसलिए “when he finishes his work” समयवाचक क्रिया-विशेषण उपवाक्य (Adverb Clause of Time) है।
Example:
• I will call you when I reach home.