Q. What is the use of "#pragma once"? (A) Used in a header file to avoid its inclusion more than once. (B) Used to avoid multiple declarations of same variable. (C) Used in a c file to include a header file at least once. (D) Used to avoid assertions 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (A) Used in a header file to avoid its inclusion more than once.