R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Science Q. Nitrogen is an essential constituent of all (A) Proteins (B) Carbohydrates (C) Fats (D) Vitamins 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (A) Proteins You must be Logged in to update hint/solution 💬 Discussion 💬 Comment