R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Biology Q. What is the approximate time required for a heart-beat - (A) 0.8 2nd (B) 1.0 minute (C) 0.5 minute (D) 0.5 2nd 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) 0.8 2nd You must be Logged in to update hint/solution 💬 Discussion 💬 Comment