This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: AIIMS 2017, Subject name: Microbiology
Lipoarabinomannan (LAM) assay in urine is used for screening of? 
Select and explain. 
A. Mycobacterium tuberculosis, B. Pneumocystis jirovecii, C. Histoplasm capsulatum, D. Cryptococcus neoformans
A: Mycobacterium tuberculosis
Answer: A: Mycobacterium tuberculosis 
Explanation: Lipoarabinomannan (LAM) is a virulence factor for Mycobacterium tuberculosis. It prevents phagolysosomal fusion. It is secreted in urine so can be used for screening purposes.