If x XOR y = z and x XOR z = y, which property of XOR is being used?

Question

Accepted Answer

(C) Self-inverse (XOR with same value = 0). Explanation: XOR is self-inverse: x XOR x = 0. So x XOR z = x XOR (x XOR y) = (x XOR x) XOR y = 0 XOR y = y.