The question refers to "The logic circuit shown above", but the actual circuit diagram is not present in the provided prompt. Also, the options A, B, C, and D are blank.

Because of this, the problem cannot be solved from the given information: in logic-circuit questions, the answer depends entirely on the arrangement of gates and the specific option diagrams/expressions.

What is missing

1. The logic circuit diagram
2. The actual option figures or Boolean expressions for A, B, C, and D

Why I cannot derive the answer

To determine the equivalent logic circuit, I would normally:

1. Identify each gate in the circuit.
2. Write the Boolean expression stage by stage.
3. Simplify using Boolean algebra / De Morgan’s laws.
4. Compare the simplified form with options A–D.

But since neither the circuit nor the options are visible, none of these steps can be carried out reliably.

Comparison with stored answer

The stored correct answer is given as D, but with the diagram and options missing, I cannot verify whether D is actually correct.

Please provide the circuit image and the option diagrams/expressions, and I can solve it fully step by step.