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
Anterior lenticonus may be associated with: 
Select and explain. 
A. Alpo's syndrome, B. Lowe's syndrome, C. Marfan's syndrome, D. Homocystinuria
A: Alpo's syndrome
Answer: A: Alpo's syndrome 
Explanation: Ans. Alpo's syndrome