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: Physiology
[{'content': 'Basal cardiac output in an adult in nearly: \nSelect and explain. \nA. 7.5 litre, B. 5 litre, C. 12 litre, D. 10 litre', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. 5 litre', 'role': 'assistant'}]