The Catalytic Triad of Chymotrypsin and Other Serine Proteases Consists

The catalytic triad of chymotrypsin and other serine proteases consists of

A) three subunits of the enzyme.
B) three amino acid residues adjacent in the primary structure which act to make serine a strong nucleophile.
C) three amino acid residues close enough in space to make serine a strong nucleophile.
D) three enzymes with very similar structural features.
E) None of the above.