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
[{'content': 'Dislocation of the lens is seen in all the following conditions except \nSelect and explain. \nA. Congential Rubella, B. Marchesani Syndrome, C. Marfan Syndrome, D. Homocystimuria', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Causes of ectopia lentis (dislocation or subluxation of the lens) \n\nHomocystinuria\xa0\xa0\xa0\xa0 \xa0\nMarfan syndrome \xa0 \xa0 \xa0 \xa0\nWeil-Marchesani syndrome \xa0 \xa0 \xa0 \xa0\xa0\nEhler Danlos syndrome \xa0 \xa0 \xa0 \xa0\nHyperlysinemia\xa0\nSulphite oxidase deficiency\nStickler syndrome\nTrauma\n\xa0Consecutive/spontaneous (Hypermature cataract, buphthalmos, high myopia)', 'role': 'assistant'}]