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
Fascicular ulcer is seen in: 
Select and explain. 
A. Phlyctenular keratitis, B. Rosacea keratitis, C. Riboflavin deficiency, D. All of the above
A: Phlyctenular keratitis
Answer: A: Phlyctenular keratitis 
Explanation: Ans. Phlyctenular keratitis