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
Dislocation of lens is seen in all the following conditions except : 
Select and explain. 
A. Congenital Rubella, B. Marchesani's Syndrome, C. Marfan Syndrome, D. Homocystinuria
A: Congenital Rubella
Answer: A: Congenital Rubella 
Explanation: A i.e. Congenital Rubella