What is the correct boolean expression for the given circuit?

Answer & explanation
Correct answer: option 3
The input A directly goes into the OR gate and also first passes through NOT gate, giving another input of A' to the OR gate.
What is the correct boolean expression for the given circuit?

Correct answer: option 3
The input A directly goes into the OR gate and also first passes through NOT gate, giving another input of A' to the OR gate.