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': 'Most important muscle which opens mouth is - \nSelect and explain. \nA. Lateral pterygoid, B. Medical pterygoid, C. Masseter, D. Temporalis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Lateral pterygoid depresses the mandible to open the mouth, with suprahyoid muscles.', 'role': 'assistant'}]