Task: Question Answering
Input (English): 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:  <1> Mycobacterium bovis. <2> Mycobacterium africanum. <3> Bacillus Calmette-Guerin (BCG). <4> Mycobacterium microti. <5> Mycobacterium avium-intracellulare.
Output (English): 5