1 X ⊃ (∼Y $\lor$ Z)
2 ∼X ⊃ (Y

Multiple Choice

1. X ⊃ (∼Y $\lor$ Z)
2. ∼X ⊃ (Y $\lor$ Z)
3. ∼Z
-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) X ≡ Z
B) X ≡ ∼Z
C) Z ≡ ∼X
D) X ≡ Y
E) X ≡ ∼Y