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': 'Afferent fibres for stretch reflex includes \nSelect and explain. \nA. Ia and Ib  fibres, B. Ia  and II fibres, C. Ib  and II fibres, D. Golgi tendon organ', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]