R Roshan 🎓 Extraordinary ⭐ 2.52K Points 📊 JAVA Q. Which of the following is thread-safe? (A) ArrayList (B) HashMap (C) Vector (D) HashSet 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) Vector Explanation: Vector is synchronized and thread-safe.