This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
String sign is a radiological feature of - 
Select and explain. 
A. Crohn's disease, B. Ulcerative colitis, C. Ileocecal tuberculosis, D. Ischemic colitis
C: Ileocecal tuberculosis
Answer: C: Ileocecal tuberculosis 
Explanation: String sign → Congenital hypertrophic pyloric stenosis, Ileocecal tuberculosis.
String sign of Kantor → Crohn's disease
String of bead sign → Small bowel obstruction