The correct answer is option A
Aerobic bacteria cause an infection in the kidney, and anaerobic bacteria cause an infection in the appendix.
The common regions of human body where anaerobic infections occur include -
a) Oral cavities
b) Abdominal cavities
c) Pelvic cavities
d) Other regions like head, neck, and skin and bones
The site of anaerobic infection is commonly the site of normal colonization which usually occurs all the locations as mentioned above.