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': 'Facial muscles develop from: \nSelect and explain. \nA. I branchial arch, B. II branchial arch, C. III branchial arch, D. IV branchial arch', 'role': 'user'}, {'content': 'Answer: B \nExplanation: DEVELOPMENT OF FACE\n\nFive processes of face, one frontonasal, two maxillary and two mandibular processes form the face.\nFrontonasal process forms the forehead, the nasal septum, philtrum of upper lip and premaxilla bearing upper four incisor teeth.\nMaxillary process forms whole of upper lip except the philtrum and most of the hard and soft palate except the part formed by the premaxilla.\nMandibular process forms the whole lower lip.\nCord of ectoderm gets buried at the junction of frontonasal and maxillary processes. Canalisation of ectodermal cord of cells gives rise to nasolacrimal duct.\n\nKey Concept:\nEmbryologically, they develop from the mesoderm of the second branchial arch, and are, therefore,\xa0supplied by the facial nerve.', 'role': 'assistant'}]