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22169 Anatomy

A 2-year-old boy presented to the ER with stridor, shoness of breath and difficulty in swallowing. Patient also gave history of recurrent chest infections in the past for which the child was frequently hospitalized. Upper GI endoscopy was done and it was normal. Lab findings revealed normal studies. Chest x- ray All of the following are involved in the development of the structure causing the above condition except: –

ACaudal pa of right dorsal aoa
BRight 7th cervical intersegmental aery
CRight 4th arch
DCranial pa of right dorsal aoa
Anatomy
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