This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Virology, Subject name: Microbiology
Most common agent causing tuberculosis in AIDS patient in tropical countrie is - 
Select and explain. 
A. Mycobacterium tubercolusis, B. Mycobacterium intracellulare, C. Mycobacteriumparvum, D. Mycobacterium atypical
A: Mycobacterium tubercolusis
Answer: A: Mycobacterium tubercolusis 
Explanation: In the USA and other Western countries the characteristic pathogen now is M.tuberculosis. REF:ANANTHANARAYAN AND PANIKER'S TEXTBOOK OF MICROBIOLOGY 9TH EDITION PAGE NO-576