can anyone please share the solution

Hint: try x = 2 and x = -2.

answer would be “D” bcz try 1 and -1, for 1 you are getting 1 which is “C”

but for -1 we are getting -1, so b is bigger, so answer is D.

a hint:- when gre doesn’t give any hint like integer, etc, always try -2,2,1/2,-1/2.