Which of the following is/are proper method to dispose sludge ? (A) Incineration (B) Dumping (C) Anaerobic diestion by microbes (D) Filtration

Which of the following is/are proper method to dispose sludge ? (A) I

1.	Which of the following is/are proper method to dispose sludge ? (A) Incineration (B) Dumping (C) Anaerobic diestion by microbes (D) Filtration
Answer» C, D A, B B, C, D A, B, C Answer :4