Question

Given below are four statements along with their respective duals. Which dual statement is not correct?

विकल्प

• (∼p ∧ q) ∨ (r ∧ s), (∼p ∨ q) ∧ (r ∨ s)

• (∼p ∧ q) ∨ p, (∼p ∨ q) ∧ p

• (p ∨ ∼q) ∧ r, (p ∧ ∼q) ∨ r

• (p ∨ q) ∨ s, (p ∨ q) ∨ s

Answer 1

(p ∨ q) ∨ s, (p ∨ q) ∨ s

Explanation:

Dual of '(p ∨ q) ∨ s' is  `(p ∨ q) ∨ s`.