Answer C) Annular pancreas
Embryologic deformity of the pancreas
Pancreas normally develops from one dorsal and two ventral buds
Ventral buds normally rotate with duodenum, but if they fail to do so, annular pancreas may form
Three theories to explain this:
Adherence of the ventral bud to the duodenal wall prior to rotation, resulting in its persistence and encirclement of the duodenum (Lecco’s theory).
Persistence and enlargement of the left ventral bud (Baldwin’s theory).
Hypertrophy and fusion of the ventral and dorsal buds before rotation of the gut, resulting in complete encirclement of the duodenum