This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Embryology of Ear and Malformations, Subject name: ENT
[{'content': 'Stapes is derived from which branchial arch: \nSelect and explain. \nA. I, B. II, C. III, D. IV', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans (b) IIRef: Inderbir Singh's Embroyology, 7th ed. 1119-120* Ear ossicles are derived from branchial arch I and II* Malleus and incus: BA-I* Stapes: BA- II", 'role': 'assistant'}]