A Peptide Bond Is the Result of a Condensation Reaction

A peptide bond is the result of a condensation reaction between ________

A) two carboxylic acid groups on different amino acids.
B) an amino group on one amino acid and the carboxylic acid group on another.
C) two amino groups on different amino acids.
D) an amino group and a carboxylic acid group on the same amino acid.
E) an amino group and a carboxylic acid group, producing a zwitterion.