They had an insipid conversation.

A. curious

B. loud

C. argumentative

D. lively

Answer: Option D

Solution(By Examveda Team)

Insipid : lacking flavour; weak or tasteless.
Curious : eager to know or learn something.
Loud : producing or capable of producing much noise.
Argumentative : given to arguing.
Lively : full of life and energy; active and outgoing.

Antonym of Insipid is Lively