For given logic diagram, output $F=1$, then inputs are

• A

  $A=0, B=0, C=0$
• Correct answer
  B

  $A=0, B=1, C=0$
• C

  $A=1, B=1, C=1$
• D

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

Solution

When $A=0, B=1\mathrm{ }\mathrm{a}\mathrm{n}\mathrm{d} C=0$ , then output becomes 1.

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