Select the Answer That Best Describes an Aqueous Solution Made $\times$

Multiple Choice

Select the answer that best describes an aqueous solution made from each of the following substances:
-solid ammonium perchlorate (NH₄ClO₄) For NH₄⁺,K_a = 5.6 $\times$ 10^-10;for ClO₄^-,K_b $\times$ 10^-21.

A) acidic
B) basic
C) neutral
D) cannot tell
E) none of these (A-D)