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': 'A. patient on enteral nutrition develops diarrhea. Which of the following statements is/are true   a) Diarrhea seen in > 30% cases  b) More in duodenal nutrition than jejunal nutrition  c) MC cause is contamination of food  d) In persistent diarrhea clostridium difficile should be excluded \nSelect and explain. \nA. ad, B. ab, C. ac, D. bd', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]