R Ruchi Sharma 🎓 Tutor III ⭐ 9.87K Points 📊 Biology Q. Asthma is caused due to (A) Infection of trachea (B) Infection of lung (C) Bleeding into pleural cavity (D) Spasm in bronchial muscles 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (D) Spasm in bronchial muscles You must be Logged in to update hint/solution 💬 Discussion 💬 Comment