In the sentence 'They were asked to wait "Till the signal was given ' the underlined part constitute ---
A
an adjective clause.
B
a noun clause
C
a pronoun clause .
D
an adverb clause
Correct Answer: an adverb clause
Before, wherever, while, till, until, দ্বারা adverbial clause of time শুরু হয় এবং till দ্বারা শুরু হওয়া clause টি verb wait - কে modify করেছে। সুতরাং clause টি an adverb clause।