R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Biology Q. Haemoglobin in the blood is a complex protein rich in (A) Silver (B) Iron (C) Gold (D) Copper 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (B) Iron You must be Logged in to update hint/solution 💬 Discussion 💬 Comment