CH3 C≡CCH3
HC≡CH
CH3C≡CH
CH3CH2C≡CH
Correct answer is A
Only terminal alkyne(simply, the alkyne in which the triple bonded carbon atoms are at the extreme positions.) reacts with ammonical AgNO3 and gives a white precipitate,
therefore, the correct option is A (Non-Terminal Alkyne has a triple bond at any place other than the end positions).