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': 'The commonest side effect of lens implant surgery is: \nSelect and explain. \nA. Vitreous haemorrhage, B. Glaucoma, C. Iridocyclitis, D. Panophthalmitis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. Iridocyclitis', 'role': 'assistant'}]