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': 'Stain specific for DNA staining is \nSelect and explain. \nA. Feulgen, B. Malchite green, C. Crystal violet, D. Nigrosin', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Staining of Nucleoids:Nucleoids are stainable with the Feulgen stain, which is specific for DNA.Ref: Jawetz; 27th edition; Page no: 39', 'role': 'assistant'}]