<prompt> Phlyctenular keratoconjunctivitis is due to hypersensitivity to which of the following allergensPollenChemicalsMycobacterium tuberculosis proteinsAnimal fur  <response>: Phlyctenular keratoconjunctivitis is due to hypersensitivity to endogenous allergens like Mycobacterium tuberculosis proteins and Staphylococcus proteins. 