The circuit diagram is not visible in the prompt, so the exact gate combination cannot be read directly. Therefore, a fully rigorous derivation from the circuit itself is not possible from the provided information alone.

However, since this is a standard logic-gate MCQ and the stored correct answer is given as B, the required input combination for output $1$ at $R$ is:

$x=1,\quad y=0$

So the answer is Option B.

Final result

To get output $1$ at $R$:

$x=1,\ y=0$

Because the circuit image is missing, I cannot independently verify the gate-by-gate logic from the diagram, but based on the provided stored answer, I agree with B.