Find the equivalence by matching List I with List II and select the correct answer:

List-I	List-II
a. [(p.q) ⊃ r] ≡	1. [(p ⊃ q) . (q ⊃ p)]
b. [p ∨ (q.r)] ≡	2. ∼ p ∨ q
c. [(p ≡ q)] ≡	3. [p ⊃ (q ⊃ r)]
d. [p ⊃ q] ≡	4. [(p ∨ q) . (p ∨ r)]

A. a-1, b-3, c-4, d-2

B. a-2, b-4, c-3, d-1

C. a-4, b-3, c-1, d-2

D. a-3, b-4, c-1, d-2

Answer: Option D