KCET 2010 Math Solved Paper

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Question : 10 of 60

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Which of the following is NOT true?

p→(q∧r)≡(p→q)∧(p→r).
∼(p↔q)≡(p∧∼q)∨(∼p∧q).
(p∧∼q)↔(p→q) is a tautology.
{(p→q)∧(q→r)}→(p→r) is a tautology.

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