This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Biochemistry
Trypsin cleavesa) Arginineb) Glutamatec) Lysined) Proline 
Select and explain. 
A. a, B. bc, C. ac, D. b
C: ac
Answer: C: ac 
Explanation: Trypsin hydrolyses peptide bonds fornied by carboxy terminal of lysine and arginine