This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Which of the following statements is true of cholera enterotoxin? \nSelect and explain. \nA. Appears to produce its effect by stimulating adenyl cyclase activity in mucosal cells, B. Causes destruction of the intestinal mucosa allowing for invasive infection, C. Causes a net efflux of ions and water from tissue into the lumen of the large intestine, D. Is a protein with a molecular weight of about 284,000', 'role': 'user'}, {'content': 'Answer: A \nExplanation: .', 'role': 'assistant'}]