Behave (as a gentleman behaves). The bracket part is -
A
an adverb clause
B
an adjective clause
C
a noun clause
D
a principal clause
Correct Answer: an adjective clause
যে সব clause, adverb এর মতো verb কে modify করে তা adverb clause. As a gentle man behaves " verb কে modify করেছে। সুতরাং সঠিক উত্তর an adverb clause.