To get an output $Y=1$ in given circuit which of the following input will be correct

• A

  A-1, B-0, C-0
• Correct answer
  B

  A-1, B-0, C-1
• C

  A-1, B-1, C-0
• D

  A-0, B-1, C-0

Solution

Here $Y=(A+B) \cdot C$ Truth Table
$C$ should be 1 either $A$ and $B$ or both $A$ and $B$ are 1 Therefore, $A=1, B=0, C=1$

Hence, the correct answer is option: 'B'.