Which circuit can create entanglement?

Question: Which circuit pattern can create entanglement from two qubits initially in |00⟩? A) Measure both qubits immediately B) Apply Z to both qubits only C) Apply SWAP twice only D) Apply H to the first qubit, then CNOT from the first to the second Correct: D Explanation: Applying H to the first qubit creates superposition. Applying CNOT then correlates the second qubit with the first, producing an entangled Bell-like state. Topic: quantum computing / Bell states / entanglement