A Admin 🎓 Coach ⭐ 38.03K Points 📊 PHP Q. Which PHP extension is required to use PDO? (A) mysqli (B) pdo_mysql (C) pdo (D) mysql 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) pdo Explanation: The PDO core extension is required; drivers like pdo_mysql are database-specific.