This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Hypoacusis is caused by paralysis of which of the following muscle ? \nSelect and explain. \nA. mylohyoid, B. tensor tympani, C. tensor vili palatini, D. macula densa', 'role': 'user'}, {'content': "Answer: B \nExplanation: Hypoacusis, i.e., paial deafness to low pitched sounds due to paralysis of tensor tympani muscle. REF : B D Chaurasia's Human Anatomy , seventh edition , volume 4 , pg, no., 69.", 'role': 'assistant'}]