The diagram shows the "OR" logic gate.
So, option (B) "OR" is the correct answer.
Logic Gate: "OR"
One output and two or more inputs are possible with an OR gate.
This gate's logic dictates that if at least one of its inputs is 1, then its output must likewise be 1.
The OR gate's output will be decided by the following mathematical procedure if there are two inputs, A and B: Y=A+B