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
Pathognomonic feature of trachoma is: 
Select and explain. 
A. Bulbar papillae, B. Palpebral papillae, C. Bulbar follicles, D. Palpebral follicles
C: Bulbar follicles
Answer: C: Bulbar follicles 
Explanation: Ans. Bulbar follicles