Which of the Following Is Not True About Serine Proteases

Which of the following is not true about serine proteases?

A) They are called serine proteases because they are able to break the peptide chain at the serine linkage.
B) Endopeptidases and serine proteases are synonyms with each other.
C) Trypsin,chymotrypsin,and elastase are all serine proteases.
D) Serine proteases catalyze the hydrolysis of protein peptide chains.
E) They are called serine proteases because they all have a serine residue that participates in the catalytic process.