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
Staphylococcus is? 
Select and explain. 
A. Gram-positive cocci, B. Gram-negative cocci, C. Gram-positive bacillus, D. Gram-negative bacillus
A: Gram-positive cocci
Answer: A: Gram-positive cocci 
Explanation: Staphylococcui are Gram-positive cocci that occur in grape like clsters . Ref: Ananthanarayan & panikers Textbook of Microbiology 9th edition page no199