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
Hypoacusis is caused by paralysis of which of the following muscle ? 
Select and explain. 
A. mylohyoid, B. tensor tympani, C. tensor vili palatini, D. macula densa
B: tensor tympani
Answer: B: tensor tympani 
Explanation: 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.