This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Systemic Bacteriology (Gram Positive Bacilli, Gram Negative Bacilli), Subject name: Microbiology
[{'content': 'Acid fastness of tubercle bacilli is \nSelect and explain. \nA. Presence of mycolic acid, B. Integrity of cell wall, C. Both of the above, D. None of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Acid fastness - ability to resist decolorisation TB bacilli is 20 % acid fast This propey is due to presence of mycolic acid it has nothing to do with integrity of cell wall', 'role': 'assistant'}]