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': 'The subdermal plexus forms the vascular basis for - \nSelect and explain. \nA. Randomised flaps, B. Axial flaps, C. Mucocutaneous flaps, D. Fasciocutaneous flaps', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]