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 the lens is seen in all the following conditions except 
Select and explain. 
A. Congential Rubella, B. Marchesani Syndrome, C. Marfan Syndrome, D. Homocystimuria
A: Congential Rubella
Answer: A: Congential Rubella 
Explanation: Causes of ectopia lentis (dislocation or subluxation of the lens) 

Homocystinuria      
Marfan syndrome        
Weil-Marchesani syndrome         
Ehler Danlos syndrome        
Hyperlysinemia 
Sulphite oxidase deficiency
Stickler syndrome
Trauma
 Consecutive/spontaneous (Hypermature cataract, buphthalmos, high myopia)