No RPF (even I got the same ans )
But ans given is D
argument : disareement : :
(A) ignore : judgement
(B) mitigate : repent
(C) punish : criminal
(D) thought : thinking
An argument stems from a disagreement, a thought stems from thinking!
Madhumitha's explanation is perfect.
Moreover, argument is a noun, & so is thought....rest in A,B,C are verbs. ;)