R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Biology Q. The red blood cells are produced by the (A) Hormones (B) Bone-marrow (C) Heart (D) Liver 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (B) Bone-marrow You must be Logged in to update hint/solution 💬 Discussion 💬 Comment