Figure it out fridays 

21 year old female who has chronic constipation since infancy (colonoscopy showed no abnormalities) presented to the emergency department with symptoms of occlusive syndrome (as seen in the Xray). Emergency laparotomy was done and the specimen is as shown. 

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What is the diagnosis?

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A.Internal hernia

B.Volvulus

C.Duplication of the colon

D.Obstructing tumor