This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General surgery, Subject name: Surgery
[{'content': 'What is the Size of this blade used in incision and Drainage \nSelect and explain. \nA. 11 size, B. 13 size, C. 15 size, D. 22 size', 'role': 'user'}, {'content': "Answer: A \nExplanation: There are 3 blades commonly used by Surgeons: - * 11' size- For Incision and Drainage of Abscess, Aeriotomy * 15' Size- For precise cosmetic incisions * 22' Size- For Long Incisions and Laparotomy Incisions Ref:- Surgery Sixer 3rd Edition; Pg num:- 39", 'role': 'assistant'}]