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
Organism not invading intact cornea 
Select and explain. 
A. Gonococci, B. C. diphtheriae, C. Meningococci, D. Pseudomonas
D: Pseudomonas
Answer: D: Pseudomonas 
Explanation: Answer- D. PseudomonasThe organisms which can penetrate intact corneal epithelium are Neisseria gonorrhoea, Haemophilus aegyptus, corynebacterium diphthriae, Listeria species and Neisseria meningitidis.