Which of the following are tautologies? (i) (p ∧ q) → p (ii) p → (p ∨ q) (iii)…
Which of the following are tautologies?
(i) (p ∧ q) → p
(ii) p → (p ∨ q)
(iii) ¬p → (p → q)
(iv) (p ∧ (p → q)) → q
(v) ¬(p → q) → p
- A.
(i), (ii), (iii) and (iv) only
- B.
(i), (ii), (iv) and (v) only
- C.
(iii), (iv) and (v) only
- D.
(i), (ii), (iii), (iv) and (v)
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