Gate CS 1995 || What values of A, B, C and D satisfy the following simultaneous Booleanequations?

What values of A, B, C and D satisfy the following simultaneous Boolean
equations?
A' + AB = 0, AB = AC, AB +AC' +CD = (CD)'
(a) A = 1, B = 0, C = 0, D = 1 (b) A = 1, B = 1, C = 0, D = 0
(c) A = 1, B = 0, C = 1, D = 1 (d) A = 1, B = 0, C = 0, D = 0
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