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
Posterior belly of digastric is derived from: 
Select and explain. 
A. First brachial arch, B. First brachial pouch, C. Second brachial arch, D. Second pharyngeal pouch
C: Second brachial arch
Answer: C: Second brachial arch 
Explanation: None