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': "Posterior lenticonus is seen in - \nSelect and explain. \nA. Alpo's syndrome, B. Lowe's syndrome, C. Marfan syndrome, D. Homocystinuria", 'role': 'user'}, {'content': "Answer: B \nExplanation: Lenticonus: It refers to cone-shaped elevation of the anterior pole (lenticonus anterior) or posterior pole (lenticonus posterior) of the lens. Lenticonus anterior may occur in Alpo's syndrome and lenticonus posterior in Lowe's syndrome. REF IMG", 'role': 'assistant'}]