At a Physiological PH of 7

At a physiological pH of 7.4,amino acids exist as zwitterions because the pK_a of the -NH₃⁺ group is ________ 7.4,and the pK_a of the -COOH group is ________ 7.4.

A) greater than / less than
B) less than / greater than
C) greater than / greater than
D) less than / less than
E) equal to / equal to