R Ram Sharma 🎓 Coach ⭐ 193.88K Points 📊 Physics Q. What Igor Sikorsky invented? (A) Hydroplane (B) Jet engine airplane (C) Glider (D) Helicopter 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (D) Helicopter You must be Logged in to update hint/solution 💬 Discussion 💬 Comment