Two 2's complement number having sign bits X and Y are added and the sign bit of the result is Z. then, the occurrence of overflow is indicated by the Boolean function.

Two 2's complement number having sign bits X and Y are added and the s

1.	Two 2's complement number having sign bits X and Y are added and the sign bit of the result is Z. then, the occurrence of overflow is indicated by the Boolean function.
A.	XYZ
B.	X̅ Y̅ Z̅
C.	X̅ Y̅Z + XY Z̅
D.	XY + YZ + ZX
Answer» E.