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': "Toynbee's muscle is \nSelect and explain. \nA. Tensor tympani, B. Stapedius, C. Levator ani, D. Scalenus minimus", 'role': 'user'}, {'content': 'Answer: A \nExplanation: Tensor tympani is called as Toynbee muscle origin, the cailaginous pa of the pharyngotympanic (auditory) tube and the walls of its hemicanal just above the bony poion of the pharyngotympanic tube; inseion, handle of malleus; action, draws the handle of the malleus medially tensing the tympanic membrane to protect it from excessive vibration by loud sounds. nerve supply, branches of trigeminal through the otic ganglion Ref - Pubmed.com', 'role': 'assistant'}]