A Ankit Singh 🎓 Tutor III ⭐ 7.83K Points 📊 Chemistry Q. The main source of carbon monoxide is (A) Industrial process (B) Fuel combustion (C) Transportation (D) Solid waste disposal 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (C) Transportation You must be Logged in to update hint/solution 💬 Discussion 💬 Comment