This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
Likely cause of this manifestation is: 
Select and explain. 
A. Candida, B. Pseudomonas, C. Staphylococcus aureus, D. Fusarium
B: Pseudomonas
Answer: B: Pseudomonas 
Explanation: Diagnosis of this image is green nail syndrome. Paronychial infection that can develop in individuals whose hands are frequently submerged in water. Cause- Pseudomonas aeruginosa