Question

Proper drainage system helps ______.

विकल्प

• to prevent floods

• to maintain clean and hygienic environment

• to collect the waste water for proper treatment

• All of these

Answer 1

Proper drainage system helps to prevent floods, to maintain clean and hygienic environment and to collect the waste water for proper treatment.

Explanation:

A proper drainage system helps prevent floods by efficiently removing excess surface or subsurface water; maintains a clean, hygienic environment by removing wastewater and preventing water stagnation; and collects wastewater for proper treatment, thus preventing pollution. Therefore, all these functions are important roles of a proper drainage system.