This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: general microbiology, Subject name: Microbiology
[{'content': 'Staphylococcus is? \nSelect and explain. \nA. Gram-positive cocci, B. Gram-negative cocci, C. Gram-positive bacillus, D. Gram-negative bacillus', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Staphylococcui are Gram-positive cocci that occur in grape like clsters . Ref: Ananthanarayan & panikers Textbook of Microbiology 9th edition page no199', 'role': 'assistant'}]