Definition: You are given a question on high school chemistry. You are also given 4 answer options (associated with "A", "B", "C", "D"), out of which only one is correct. You need to answer the question by selecting the correct option. You should only answer with the choice letter, not the whole answer.
Input: Which of the following salts is expected to produce an alkaline solution when one mole is dissolved in one liter of water?
(A)NaClO4 (B)CaCl2 (C)NH4Br (D)Na2S

D