1 Q ⊃ ∼(R $\lor$ S)
2 ∼R ⊃ T
3

Multiple Choice

1. Q ⊃ ∼(R $\lor$ S)
2. ∼R ⊃ T
3. U ⊃ S
-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) Q ⊃ (T • ∼U)
B) Q ⊃ (R • S)
C) Q ⊃ (S • ∼T)
D) Q ⊃ (∼T • ∼U)
E) Q ⊃ (U • T)