The structure of procaine, whose hydrochloride salt is the local anesthetic known as Novocain, is shown below. 
At physiological pH,
A) only nitrogen 1 will be protonated.
B) only nitrogen 2 will be protonated.
C) both nitrogen 1 and 2 will be protonated.
D) neither nitrogen 1 nor 2 will be protonated.
Correct Answer:
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