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': 'Most commonly used scalpel blade for intraoral surgery is: \nSelect and explain. \nA. No.15, B. No.11, C. No.12, D. No.10', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Most commonly used scalpel blade for intraoral surgery – No. 15\nThe blade used primarily for making small stab incisions, such as for incising an abscess – No. 11\nBlade commonly used for skin incisions – No. 10 blade\nThe hooked blade commonly used for mucogingival procedures – No. 12 blade\nThe blades commonly used in gingivectomy – No. 11 and 12\nThe blade used for incising periodontal abscess – No. 12', 'role': 'assistant'}]