Q. Which of the following is a sound rule of inference? (A) q ∧ (p → q) → p (B) p → (p ∨ q) (C) q ∨ (p → q) → p (D) all of above 👁️ Show Answer 💬 Discuss 🔗 Share ⚡Menu ✅ Correct Answer: (B) p → (p ∨ q)