The "Zwitterion" Form of the Amino Acid Glycine Is

The "zwitterion" form of the amino acid glycine is:
H₃N⁺CH₂CO₂^-. The properties of the various amino acids depend heavily on the presence (or absence) of charge on the side chain. Consider the amino acid arginine, for example, which has the following Lewis structure:

Determine the Formal Charge on the nitrogens labeled 1, 2 and 3.

A) N(1) = 0, N(2) = +1, and N(3) = 0
B) N(1) = 0, N(2) = -1, and N(3) = 0
C) N(1) = +1, N(2) = 0, and N(3) = +1
D) N(1) = -1, N(2) = 0, and N(3) = -1
E) N(1) = +1, N(2) = 0, and N(3) = -1