This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T, Subject name: Surgery
[{'content': 'The following statement about Pilonidal sinus is true \nSelect and explain. \nA. More common in females, B. Mostly congentital, C. Prognosis after surgery is poor, D. Treatment of choice is surgical excision of sinus tract', 'role': 'user'}, {'content': "Answer: D \nExplanation: The term pilonidal sinus describes a condition found in the natal cleft overlying the coccyx, consisting of one or more, usually noninfected, midline openings, which communicate with a fibrous track lined by granulation tissue and containing hair lying loosely within the lumen. A common affliction amongst the military, it has been referred to as 'jeep disease'. Ref: Bailey & Love&;s Sho Practice of Surgery,E25,Page-1247", 'role': 'assistant'}]