The question asks which circuit is equivalent to the given circuit, but the actual circuit diagrams for the given circuit and options $A, B, C, D$ are not present in the prompt.

Without the circuit diagrams, it is impossible to:

1. Identify the logic operation performed by the given circuit.
2. Compare it with the option circuits.
3. Verify whether option $A$ is truly correct.

What is needed

To solve this properly, I need the image or description of:

• the given circuit, and
• the circuits in options $A, B, C, D$.

Conclusion

Since the essential circuit information is missing, the answer cannot be derived from the provided data.