In addition of two binary variables A and B results into a SUM and a C – McqOptions

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1.	In addition of two binary variables A and B results into a SUM and a CARRY output. Consider the following expressions for the SUM and CARRY outputs. (1) SUM = A. B + A B (2) SUM = A.B + B.A (3) CARRY = A. B (4) CARRY = A + B Which of the following expressions are correct?
A.	1 and 2
B.	2 and 3
C.	2 and 4
D.	1 and 4
Answer» C. 2 and 4

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