JEE Main 10 Apr 2019 Paper 1 Solved Paper

Section: Mathematics

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Question : 84 of 90

Marks: +1, -0

Which one of the following Boolean expressions is a tautology?

[10 Apr 2019 Shift 1]

(p∨q)∨(p∨∼q)
(p∧q)∨(p∧∼q)
(p∨q)∧(p∨∼q)
(p∨q)∧(∼p∨∼q)

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