P Priyanka Tomar 🎓 Tutor III ⭐ 35.28K Points 📊 Geography Q. The oldest oil refinery in India is at ? (A) Haldia (B) Koyali (C) Digboi (D) Noonmati 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (C) Digboi You must be Logged in to update hint/solution 💬 Discussion 💬 Comment