This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pancreas, Subject name: Surgery
Which of the following is true regarding mutations related to pancreatitis? 
Select and explain. 
A. Hereditary pancreatitis: PRSS1, B. Idiopathic chronic pancreatitis: CFTR, C. Tropical calcific pancreatitis: SPINK1, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Syndromes Mutations Hereditary pancreatitis PRSS 1 (cationic trypsinogen)gene Idiopathic chronic pancreatitis CFTR Tropical calcific pancreatitis SPINK1 (PTSI)