. An aqueous solution of an acid is so weak that it can be assumed to be practically unionized

An aqueous solution of an acid is so weak that it can be assumed to be practically unionized when boiled at 100.4 C. 25 mL of the solution was neutralized by 38.5 mL of 1 N solution of NaOH. Choose the basicity of the acid if K_b for water is 0.52 K mol^-1 kg.

A. 1

B. 2

C. 3

D. 4