This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gastrointestinal System, Subject name: Physiology
Which of these digestive enzymes is NOT present in pancreatic juice? 
Select and explain. 
A. Elastase, B. Colipase, C. Ribonuclease, D. Enteropeptidase
D: Enteropeptidase
Answer: D: Enteropeptidase 
Explanation: Principal digestive enzymes