If and be the coefficients of x^4 and x^2 respectively in the expansion of (x+ x^2-1 )^6+ (x- x^2-1 )^6, then...

Question

If and be the coefficients of x^4 and x^2 respectively in the expansion of (x+ x^2-1 )^6+ (x- x^2-1 )^6, then :

Accepted Answer

(A)

JEE Main 2020 Mathematics question