R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Biology Q. 'Pace-maker' is related with (A) Kidney (B) Lung (C) Brain (D) Heart 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (D) Heart You must be Logged in to update hint/solution 💬 Discussion 💬 Comment