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: Medicine
[{'content': 'The pathognomonic feature of classic alpo syndrome is: \nSelect and explain. \nA. Lenticonus and hematuria, B. Hematuria and sensorineural hearing loss, C. Sensorineural hearing loss and lenticonus, D. Hematuria and hyperextensibility of joints', 'role': 'user'}, {'content': 'Answer: A \nExplanation: The diagnosis of classic alpo syndrome is based on X-linked inheritance of hematuria, sensorineural hearing loss, and lenticonus. The lenticonus together with hematuria is pathognomonic of classic Alpo syndrome. Reference: Harrisons Principles of Internal Medicine, 18th Edition, Pages 3213-14', 'role': 'assistant'}]