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 the following is not synthesized in an inactive precursor form? 
Select and explain. 
A. Carboxypeptidase, B. Colipase, C. Phospholipase, D. Pepsin
C: Phospholipase
Answer: C: Phospholipase 
Explanation: Most of the digestive tract enzymes are first synthesized in the form of an inactive precursor, from which the active enzyme is cleaved. Pepsinogen, pro-colipase, procarboxypeptidase are the precursor forms for the options given. Phospholipase is not synthesized in a precursor form.