This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Inflammations of Conjunctiva - Infective, Subject name: Ophthalmology
Herbert's pits are seen in - 
Select and explain. 
A. Trachoma, B. Spring catarrh, C. Phlyctenular conjunctivitis, D. Sarcoidosis
A: Trachoma
Answer: A: Trachoma 
Explanation: Ans. is 'a' i.e. Trachoma Signs of Trachomao Conjunctival signs:- Congestion, conjunctival follicles (boiled sagograin like), Papillary hyperplasia, conjunctival scarring (Arifs line), concretion.o Corneal signs Superficial keratitis, Herbert follicles, Pannus, Corneal ulcer, Herbert pits, Corneal opacity.