What is transpilation?

Question: What does transpilation usually mean in quantum computing? A) Running a circuit many times to collect counts B) Rewriting a circuit to match a target backend's gates, connectivity, and constraints C) Measuring qubits before applying gates D) Copying a quantum state into classical memory Correct: B Explanation: Transpilation converts a high-level circuit into an equivalent circuit suitable for a specific backend. It may include gate decomposition, optimization, qubit mapping, and routing. Topic: quantum computing / transpilation / compilers