Q.

For the given logic circuit, which of the following inputs combination will make both LED-1 and LED-2 to glow                [2026]

1 A = 0, B = 1, C = 1  
2 A = 1, B = 0, C = 0  
3 A = 1, B = 0, C = 1  
4 A = 0, B = 1, C = 0  

Ans.

(3)

option (1)⇒A=0, B=1, C=1

x=1, y=0

both will not glow

option (2)⇒A=1, B=0, C=0

x=1, y=0

will not glow

option (3)⇒A=1, B=0, C=1

x=1, y=1

both will glow