NIMCET 2017 Question Paper with solutions

A A'= 0
So, option (a) is wrong
A + AB
A ( 1 + B)=A
So, option (b) is wrong.
A + A'B
(A + A') (A -+ B)
1 (A + B) = A + B
So, option (c) is right.
A (A + B)A.A + B = A + B
So, option (d) is wrong.