M Madhu 🎓 Tutor II ⭐ 12.07K Points 📊 Computer Q. Primary key is a ______? (A) Common key (B) Unique key (C) Input key (D) Output key 👁️ Show Answer 🔗 Share ⚡Menu ✅ Correct Answer: (B) Unique key You must be Logged in to update hint/solution 💬 Discussion 💬 Comment