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
String sign of Kantor seen in? 
Select and explain. 
A. Chrons discose, B. Ulcerative colitis, C. Both, D. None
A: Chrons discose
Answer: A: Chrons discose 
Explanation: .Kantor's sign (String sign of Kantor): A radiological sign described in barium enema follow through in patients suffering from Crohn's disease. A string like configuration of contrast material through a filling defect is seen in the radiography. ref:SRB&;s manual of surgery,ed 3,pg no 1153