This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: mycology, Subject name: Microbiology
[{'content': 'Latex agglutination study of the antigen in CSF helps in the diagnosis of \nSelect and explain. \nA. Cryptococcus, B. Candidiasis, C. Aspergillosis, D. Histoplasmosis', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Latex agglutination test - cryptococcal capsular polysaccharide antigen can be detected in CSF, serum or urine by latex agglutination test. Ref: Textbook of Microbiology, Ananthanarayan and Paniker; 9th edition', 'role': 'assistant'}]