To get an output 1 from the circuit shown in the figure, the input must be -

A = 0, B = 1, C = 0 A = 1, B = 0, C = 0 A = 1, B = 0, C = 1 A = 1, B = 1, C = 0

A = 1, B = 0, C = 1

Here (A + B). C = Y Output is available if A & C are available.