This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Anatomy
[{'content': 'Muscle involved in the rotation and protrusion of the mandible \nSelect and explain. \nA. Masseter, B. Medial pterygoid, C. Temporalis, D. Digastric', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]