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': 'Tensor tympani is supplied by \nSelect and explain. \nA. Maxillary branch of 5th nerve, B. Mandibular branch of 5th nerve, C. Facial nerve, D. Lingual nerve', 'role': 'user'}, {'content': 'Answer: B \nExplanation: The tensor tympani lies in a bony canal that opens at its lateral end on the anterior wall of the middle ear, and its medial end on the base of skull. Nerve supply: MANDIBULAR NERVE The fibres pass through the nerve to the medial pterygoid, and through the otic ganglion, without any relay. Development: From the mesoderm of first branchial arch Action: Tensing the tympanic membrane Ref:BDC 6th edition pg 281 (vol 3)', 'role': 'assistant'}]