R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Science Q. The percentage of oxygen in air is approx. (A) 78% (B) 100% (C) 1% (D) 21% 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (D) 21% You must be Logged in to update hint/solution 💬 Discussion 💬 Comment