Let, x1 ⊕ x2 ⊕ x3 ⊕ x4 = 0 where x1, x2, x3, x4 are Boolean vari – McqOptions

MCQOPTIONS

1.	Let, x1 ⊕ x2 ⊕ x3 ⊕ x4 = 0 where x1, x2, x3, x4 are Boolean variables, and ⊕ is the XOR operator.Which one of the following must always is TRUE?
A.	x1x2x3x4 = 0
B.	x1x3 + x2 = 0
C.	x̅1 ⊕ x̅3 = x̅2 ⊕ x̅4
D.	x1 + x2 + x3 + x4 = 0
Answer» D. x1 + x2 + x3 + x4 = 0

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