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: Medicine
[{'content': 'Consider the following : 1. Malnutrition, 2. Lithostatin (pancreatic stone protein) deficiency, 3. Cassava tuber, 4. Oxidant stress (heightened cytochrome P-450 activity). Which of the above produce tropical calcific pancreatitis (fibrocalculous pancreatic diabetes)? \nSelect and explain. \nA. 1, 2 and 3 only, B. 2, 3 and 4 only, C. 1 and 4 only, D. 1, 2, 3 and 4', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]