The electric circuit shown in the diagram represents a

When A is connected to C (A = 1) and B is connected to ground (B = 0), D1 does not conduct but D2 conducts. Hence current flows through R and V0=0.When A = 0, B = 1, D1 conducts but D2 does not conduct, So V0=0When A = 0, B = 0, D1 and D2 both conduct and again V0=0When A = 1, B = 1,  both D1 and D2 do not conduct  and  V0=5 volt i.e., output is high.The Boolean expression of output is Y = A.B