Detailed Instructions: In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.
Q: Question: Mycobacterium tuberculosis complex includes the bacillus that causes human tuberculosis (Mycobacterium tuberculosis hominis, Koch's bacillus), as well as other mycobacteria, among which are the following, except one:
Options: <0> Mycobacterium bovis. <1> Mycobacterium africanum. <2> Bacillus Calmette-Guerin (BCG). <3> Mycobacterium microti. <4> Mycobacterium avium-intracellulare.
A:
medicine