This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anatomy (Neck), Subject name: Surgery
Branchial cyst develops from- 
Select and explain. 
A. 2nd branchial cleft, B. Is brachial arch, C. IIP arch, D. IV1h arch
A: 2nd branchial cleft
Answer: A: 2nd branchial cleft 
Explanation: Ans. is 'a' i.e., 2nd branchial cleft o Remnants of second branchial cleft are most common and are usually found in viscinity of anterior border of sternocleidomastoid.