This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Optics and refraction, Subject name: Ophthalmology
[{'content': 'Steroid induced cataract \nSelect and explain. \nA. Nuclear cataract, B. Cupuliform cataract, C. Posterior subcapsular cataract, D. Anterior subcapsular cataract', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Drug induced cataract Coricosteroid-induced cataract Posterior subcapsular opacities are associated with the use of topical as well as systemic steroids. Prolonged use of steroids in high doses may result in cataract formation. Children are more susceptible than adults. Reference: A.K.Khurana; 6th edition; Page no:195', 'role': 'assistant'}]