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
[{'content': 'Treatment surgery for fissure in ano \nSelect and explain. \nA. Lateral sphinterotomy, B. Fissurectrny, C. Seton, D. None', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Answer- A. Lateral sphinterotomyConservative t/tStool bulking agents and stool softnersNitric oxide or Glyceryl tinitrateDilatation of the sphincter under GAlaterd anal sphincterotomy - the intetnal sphincter is divided away from the ssure itself - usually either in the rigltt or the left lateral positionAnal advancement flap', 'role': 'assistant'}]