This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Surgery
[{'content': 'a 51 yr old male complaints of blood stained stools and abdominal pain diagnosis ? \nSelect and explain. \nA. sigmoid colon, B. chrons disease, C. intussusception, D. diveiculosis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Intussusception is a condition in which one segment of intestine "telescopes" inside of another, causing an intestinal obstruction (blockage). Although intussusception can occur anywhere in the gastrointestinal tract, it usually occurs at the junction of the small and large intestines. Symptoms: Vomiting; Hematochezia; Abdominal pain... ref : bailey and love 27th ed', 'role': 'assistant'}]