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
Phlyctenular conjunctivitis false is- 
Select and explain. 
A. The most common cause is tuberculosis, B. The lesions are typically found near the limbus, C. Predominantly affects children, D. Is a type IV hypersensitivity reaction
A: The most common cause is tuberculosis
Answer: A: The most common cause is tuberculosis 
Explanation: Tuberculous proteins were considered, previously, as the most common cause. Staphylococcus proteins are now thought to account for most of the cases. Age. Peak age group is 3-15 years. Phlyctenular keratoconjunctivitis is believed to be a delayed hypersensitivity (Type IV-cell mediated) response to endogenous microbial proteins. ref: A K KHURANA OPHTALMOLOGY,E4, Page-77