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
Herberts pits are seen in: 
Select and explain. 
A. Herpes keratitis, B. Fuch's dystrophy, C. Diabetes mellitus, D. Trachoma
D: Trachoma
Answer: D: Trachoma 
Explanation: Ans. is 'd' i.e. Trachoma Herbert's pits are highly pathognomic of trachoma.They are found at the limbus*