1 (N ⊃ O) ⊃ P
2 $\lor$ O) ≡ (∼Q ⊃ R)
3

Multiple Choice

1. (N ⊃ O) ⊃ P
2. (∼N $\lor$ O) ≡ (∼Q ⊃ R)
3. R $\lor$ (S ⊃ Q)
-Which of the following propositions is derivable from the given premises using any of the twenty-five rules of PL and either the direct or conditional methods of proof?

A) ∼P ⊃ ∼N
B) ∼P ⊃ O
C) ∼P ⊃ Q
D) ∼P ⊃ ∼R
E) ∼P ⊃ ∼S