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 following features of panophthalmitis differentiate it from endophthalmitis except: \nSelect and explain. \nA. Presence of pus in the anterior chamber, B. Proptosis, C. Limited and painful ocular movements, D. Complete loss of vision', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. Presence of pus in the anterior chamber', 'role': 'assistant'}]