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': 'The length of distal convoluted tubule is ? \nSelect and explain. \nA. 2 mm, B. 5 mm, C. 8 mm, D. 12 mm', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e., 5 mm', 'role': 'assistant'}]