railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) Digital Electronics Logic Gates and Boolean Algebra Logic Gates
Which of the following Boolean expression correctly represents the logic circuit diagram?
1
(A + B) . (C + D)
2
(A . B)' + (C . D)'
3
A . B + C . D
4
(A + B)' . (C + D)'