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': 'Posterior belly of digastric is derived from: \nSelect and explain. \nA. First brachial arch, B. First brachial pouch, C. Second brachial arch, D. Second pharyngeal pouch', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]