This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bacteria, Subject name: Microbiology
[{'content': 'An organism grown on agar shows green colored colonies; likely organism is: \nSelect and explain. \nA. Staphylococcus, B. E. coli, C. Pseudomonas, D. Peptostreptococcus', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans. is 'c' i.e., Pseudomonas(Ref: Ananthanarayan,9th/e, p. 314,319; Harrison, 19th/e, p. 1042, 1070)Pigments (Diffusible) - Pyocyanin - Bluish-green, Pyoverdin - Yellowish-green (Fluoroescin), Pyorubrin - Bright red, Pyomelanin - Brown-black.", 'role': 'assistant'}]