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: Ophthalmology
[{'content': 'Senile ptosis is: \nSelect and explain. \nA. Neurogenic, B. Myogenic, C. Aponeurotic, D. Mechanical', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans/. Aponeurotic', 'role': 'assistant'}]