This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Surgery
Which one of the following is the common cause of chronic pancreatitis 
Select and explain. 
A. Obesity, B. Gall stones, C. Polyposis, D. Chronic alcoholism
D: Chronic alcoholism
Answer: D: Chronic alcoholism 
Explanation: (D) Chronic alcoholism # Causes> Most common cause in the Western world of chronic pancreatitis is excess alcohol ingestion.> Gallstone-associated pancreatitis is predominantly acute or relapsing-acute in nature, and some cases of chronic pancreatitis are of undetermined or idiopathic origin.> A few are inherited or autoimmune in nature or secondary to Sphincter of Oddi Dysfunction (SOD). Other less frequent causes include chronic steroid and or anti-inflammitory use.> In up to one quarter of cases, no cause can be found.> Cystic fibrosis is the most common cause of chronic pancreatitis in children.> In other parts of the world, severe protein-energy malnutrition is a common cause.