Question

Choose the correct logic circuit for the given truth table having inputs A and B.

Inputs		Output
A	B	Y
0	0	0
0	1	0
1	0	1
1	1	1

(1) 

(2) 

(3) 

(4)

Answer 1

Correct option is : (2)

Option (1) = \((\overline{A + B}).A\)

\( = (\bar A+ \bar B).A \equiv0\)

Option (2) \( =(A+ B).A\)

\(A.A+ A.B = A\)

Option (3) = \((A+ B).\bar A\)

\(A. \bar A + \bar A.B = \bar AB\)

Option (4)

\((A+B).(B)\)

\(A.B+ B. B = B\)