Amino Acids Are the Building Blocks of the Body's Proteins

Amino acids are the building blocks of the body's proteins. Which statement concerning amino acids is false?

A) There are approximately 200 standard amino acids that occur naturally in the proteins of the human body.
B) Except for when R=H, amino acids are chiral molecules.
C) The amino acids found in human proteins are "alpha" amino acids.
D) The properties of amino acids and the proteins they compose are determined by the nature of the side chain groups that are present.