21.
Match the following:
List-I List-II
a. Negation 1. Not
b. Disjunctive 2. Or
c. Conjunction 3. And
d. Hypothetical 4. If and then

24.
Match List-I with List-II and select the correct answer:
List-I List-II
a. Exportation 1. (p ⊃ q) ≡ (q ∼ ⊃ ∼p)
b. Tautology 2. (p ⊃ q) ≡ (∼ p ∨ q)
c. Transposition 3. p ≡ (p.p)
d. Material implication 4. [(p.q) ⊃ r] ≡ [p ⊃ (q ⊃ r)]

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