Anatomy-3

The third week of development is characterized
by the appearance of the branchial apparatus,
the embryonic primordium from which head
and neck structures will be derived. The apparatus
consists of five branchial arches, numbered
1, 2, 3, 4 and 6. Second arch anomalies
represent 95% of all branchial anomalies and
are classified into four types with types I–III
being the most common. The anomalies manifest
as cysts or fistulae in the lateral neck,
located anterior and deep to the sternocleidomastoid
muscle. Which of the following structures
develop from the second branchial arch?
(A) anterior digastric muscle
(B) posterior cricoarytenoideus muscle
(C) posterior digastric muscle
(D) stylopharyngeus muscle
(E) superior constrictor muscle

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