This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Lens, Subject name: Ophthalmology
Dislocation of lens is seen in all the following conditions except 
Select and explain. 
A. Congenital rubella, B. Homocystinuria, C. Marfan syndrome, D. Weil -Marchesani syndrome
A: Congenital rubella
Answer: A: Congenital rubella 
Explanation: Congenital rubella is characterized by nuclear pearly cataract but there is no dislocation of the lens Refer: Khurana 6th edition page number236