This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Necrotising enterocolitis, Subject name: Pediatrics
[{'content': 'Indication for surgery in Necrotizing Enterocolitis is? \nSelect and explain. \nA. Pneumatosis intestinalis- Stage IIA of NEC, B. Pneumoperitoneum- Stage IIIB of NEC, C. Poal Vein gas- Stage IIB of NEC, D. Peritonitis- Stage IIIA of NEC', 'role': 'user'}, {'content': "Answer: B \nExplanation: Pneumoperitoneum -NEC stage 3b- intestinal perforation occurs. Treatment includes suppoive care along with surgery. Modified Bell's Staging Criteria:", 'role': 'assistant'}]