I Indresh Gehalot 🎓 Tutor II ⭐ 10.11K Points 📊 C Programming Q. What is the following is invalid header file in C? (A) math.h (B) mathio.h (C) string.h (D) ctype.h 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) mathio.h