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': "Elschnig's pearls is seen in - \nSelect and explain. \nA. Wilson's disease, B. Secondary cataract, C. Complicated cataract, D. Congenital cataract", 'role': 'user'}, {'content': "Answer: B \nExplanation: Clinical types of after cataract(secondary cataract). After cataract may present as thickened posterior capsule, or dense membranous after cataract or Soemmering's ring which refers to a thick ring of after cataract formed behind the iris, enclosed between the two layers of capsule or Elschnig's pearls in which the vacuolated subcapsular epithelial cells are clustered like soap bubbles along the posterior capsule. REF IMG", 'role': 'assistant'}]