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
The organism which can invade the intact corneal epithelium and produce purulent corneal ulcer is: 
Select and explain. 
A. Neisseria meningitidis, B. Pseudomonas pyocyanea, C. Pneumococcus, D. Streptococcus haemolyticus
A: Neisseria meningitidis
Answer: A: Neisseria meningitidis 
Explanation: Ans. Neisseria meningitidis