This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Conjunctiva, Subject name: Ophthalmology
[{'content': 'Type 4 hypersenstivity to mycobacterium tuberculosis antigen may manifest as \nSelect and explain. \nA. Iridocyclitis, B. Polyaeritis nodosa, C. Phlyctenular, D. Giant cell aeritis', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Most common ocular manifestation of TB is Phlyctenular keratoconjunctivitis Refer: Khurana 6th edition page number 83', 'role': 'assistant'}]