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': 'Most suitable angle of Z plasty is ? \nSelect and explain. \nA. 30 degrees, B. 45 degrees, C. 60 degrees, D. 90 degrees', 'role': 'user'}, {'content': 'Answer: C \nExplanation: .60 degree is most commonly used because it provides optimal balance between lengthening and ease of closure', 'role': 'assistant'}]