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: Surgery
The operative treatment in Hirschsprung's disease is only undertaken when child - 
Select and explain. 
A. Is 2 years of age, B. Is at least 8 kg in weight and thriving, C. Has no distension of abdomen, D. Has failed to respond to conservative treatment
B: Is at least 8 kg in weight and thriving
Answer: B: Is at least 8 kg in weight and thriving 
Explanation: • A diagnosis of Hirschsprung’s disease requires surgery in all cases.
• The classic surgical approach consisted of a multiple-stage procedure.
• This included a colostomy in the newborn period, followed by a definitive pull-through operation after the child weighed > 10 kg.