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Question:

To get output 1 for the following circuit, the correct choice for the input is.

A=0, B=1, C=0

A=1, B=0, C=0

A=1, B=0, C=1

A=1, B=1, C=0

Solution:

From the left side, the first gate is an OR gate and the next one is an AND gate. So the output of the OR gate is A+B and the output of the AND gate Y=(A+B).C
We know that for an AND gate, the output will be 1 if both inputs are 1. So, A+B=1 and C=1
In logic gates, 1+0=1, so A=1, B=0, C=1 will be the correct choice for output 1.