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 investigation of anterior uveitis of a young boy are –a) HLA B27b) X–ray sacroiliac jointc) TORCH agentsd) ELISA for HIV e) USG abdomen \nSelect and explain. \nA. ac, B. a, C. ab, D. bc', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Investigations used in the evaluation of uveitis\nAnterior\nAcute:- Urine for WBC, CBC, ESR, CRP, X-ray sacroiliac joint, HLA B-27, Chest X-ray, VDRL & FTA-ABS for syphilis, Serum ACE, Mantoux test\nChronic:- Gonioscopy, Antinuclear antibody\nPosterior\nAcute:- None\nChronic:- Eosinophil count, serum ACE, ELISA for toxoplasma & toxocariasis, chest X-ray, Mantoux test,\nVirus cultures, serum antibodies in suspected cases of CMV, HSV, VZV', 'role': 'assistant'}]