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': 'A 25–year old male gives a history of redness, pain and mild diminished vision in one eye for past 3 days. There is also a history of a low backache for the past one year. On examination, there is circumcorneal congestion, the cornea is clear apart from a few fine keratic precipitates on the corneal endothelium, there are 2+ cells in the anterior chamber and the intraocular pressure is within normal limits. The patient is most likely suffering from – \nSelect and explain. \nA. Acute attack of angle closure glaucoma, B. HLA B–27 related anterior uveitis, C. JRA associated uveitis, D. Herpetic keratitis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Information in this question are :-\n\n\nAge → 25 years\nA low backache (most likely due to sacroiliitis)\nCircumcorneal congestion, KPs, aqueous cells (2 + cells in anterior chamber)\nNormal intraocular tension\n\n\nThe diagnosis is anterior uveitis.\nA most common cause of anterior uveitis in young adults is HLA-B27 associated uveitis (ankylosing spondylitis). Low back pain (due to sacroiliitis) further supports the diagnosis.', 'role': 'assistant'}]