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ITMC 2018 Grade 10 National Preliminary set01 Question 7

ITMC · ITMC 2018 Grade 10 National Preliminary set01

Question 7

Consider (1) $\neg p\to(q\lor r)$; (2) $(\neg q\land\neg r)\to p$; (3) $p\lor q\lor r$. Which statement is true?
  1. Only (1),(2) are equivalent.
  2. Only (1),(3) are equivalent.
  3. Only (2),(3) are equivalent.
  4. No pair is equivalent.
  5. All three are equivalent.