This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Genito Urinary System, Subject name: Radiology
[{'content': 'String of beads sign seen in: \nSelect and explain. \nA. Gastroduodenal TB, B. Genital TB, C. Spinal tuberculosis, D. IleocaecalTB', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. b. Genital TBString of beads sign seen:Fibromuscular dysplasiaChr. Pancreatitis (chain of lakes)Small bowel obstructionVaricose bronchiectasisTuberculous salpingitis (Genital TB)', 'role': 'assistant'}]