Refer to the organic compounds below and their pK_a values:

Identify the following:
a. The most acidic carboxylic acid.
b. The most acidic organic compound.
c. The least acidic organic compound.

• A. a. (i)b. (vi)c. (ii)
• B. a. (i)b. (ii)c. (vi)
• C. a. (iii)b. (vi)c. (ii)
• D. a. (iii)b. (ii)c. (vi)

Answer: (B)