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
All are true about phlyctenular conjunctivitis except: 
Select and explain. 
A. It is type-IV cell mediated hypersensitivity, B. Allergens are endogenous as well as exogenous, C. Incidence is higher in girls than boys, D. Nodular lesion usually occurs near the limbus
B: Allergens are endogenous as well as exogenous
Answer: B: Allergens are endogenous as well as exogenous 
Explanation: Ans. Allergens are endogenous as well as exogenous