All are true for Mycobacteria except :

A All mycobacteria are obligate anaerobes. 
B On subculture, human tubercle bacilli usually produce visible growth on L J medium in 2-4 weeks, although on primary isolation from clinical material colonies may take up to 8 weeks to appear.
C Tubercle bacilli survive in milk and other organic materials.
D They are also heat sensitive and are destroyed by pasteurisation.



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