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': 'Occipital bellies of occipitofrontalis muscle is supplied by: \nSelect and explain. \nA. Posterior auricular nerve, B. Zygomaticotemporal nerve, C. Supratrochlear berve, D. Temporal nerve', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The occipitofrontalis muscle has two bellies, occipital or occipitalis and frontal or frontalis, both of\xa0 which are inserted into the epicranial aponeurosis. The occipital bellies are small and separate.\xa0\nEach\xa0 arises from the lateral two-thirds of the superior nuchal line.\nThe frontal bellies are longer, wider and partly united in the median plane. Each arises from the skin of the upper eyelid and forehead, mingling with the orbicularis oculi and the corrugator supercilii.', 'role': 'assistant'}]