This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Pharyngeal Arches, Subject name: Anatomy
[{'content': 'Which of the following muscle is derivative of 1st arch: \nSelect and explain. \nA. Stylopharyngeus, B. Tensor tympani, C. Platysma, D. Cricothyroid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tensor tympani muscle develops in the first pharyngeal arch. Stylopharyngeus develops in 3rd arch. Platysma develops in 2nd arch. Cricothyroid develops in 4th arch.', 'role': 'assistant'}]