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
[{'content': 'Dislocation of lens is seen in all the following conditions except \nSelect and explain. \nA. Congenital rubella, B. Homocystinuria, C. Marfan syndrome, D. Weil -Marchesani syndrome', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Congenital rubella is characterized by nuclear pearly cataract but there is no dislocation of the lens Refer: Khurana 6th edition page number236', 'role': 'assistant'}]