Spring catarrh is which type of hypersensitivity reaction -: (A) type I, (B) type II, (C) type II & III, (D) All
Answer is A. Ans. is 'a' i.e., Type I . Vernal keratoconjuctivitis is a recurrent, bilateral, external ocular inflammation primarily affecting boys and young adults living in warm, dry climates. . It is an allergic disorder in which IgE (type I) and cell mediated immune mechanisms (type IV) play an impoant role.