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: Pediatrics
[{'content': 'A two year old child presents with persistent diarrhoea acidic stools and presence of one per cent of reducing substance in the fresh stools. What is the most probable diagnosis ? \nSelect and explain. \nA. Cystic fibrosis, B. Lactose intolerance, C. Rotavirus induced diarrhoea, D. Intestinal tuberculosis', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Lactose intolerance", 'role': 'assistant'}]