M Mr. Dubey 🎓 Coach ⭐ 102.92K Points 📊 Ruby Q. Which metacharacter is used to specify optional characters in a regular expression in Ruby? (A) * (B) + (C) ? (D) . 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (C) ?