M Mr. Dubey 🎓 Coach ⭐ 102.92K Points 📊 PHP Q. Which one is a valid way to define a constant? (A) define('PI', 3.14); (B) constant PI = 3.14; (C) $PI = constant(3.14); (D) const(PI, 3.14); 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (A) define('PI', 3.14); Explanation: define() is used to create constants in PHP.