What is a parameterized quantum circuit?

Question: What is a parameterized quantum circuit? A) A circuit with no gates and no qubits B) A circuit that can only be measured once C) A circuit containing gates whose angles or values are adjustable parameters D) A circuit that cannot be optimized Correct: C Explanation: Parameterized quantum circuits contain gates with tunable parameters. They are widely used in variational algorithms such as VQE, QAOA, and quantum machine learning. Topic: quantum computing / parameterized circuits