What happens in anaerobic sludge digester?

(A) Anaerobic bacteria digest the bacteria and fungi in the sludge
(B) Aerobic bacteria digest the bacteria and fungi in the sludge
(C) Methane and Carbon dioxide is produced
(D) Methane and Nitrogen dioxide is produced

Choose the correct answer from the options given below:

(A) and (C)

The correct answer is Option (2) → (A) and (C)