Surgery Anatomy (Neck) 5778f877 Branchial cyst develops from- A 2nd branchial cleft B Is brachial arch C IIP arch D IV1h arch High-Yield 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.