Knockout NEET May 2021 (One Month)
An exhaustive E-learning program for the complete preparation of NEET..
₹ 14000/-
₹ 6999/-
Buy Now
(a) Cleaning of water is a process of removing contaminants.
(b) Wastewater released by houses is called sewage.
(c) Dried cow dung is used as manure.
(d) Drains get blocked by plastic and fats.