Question

Which of the following is the purest form of natural water?

• A. River water
• B. Filtered water
• C. Rain water
• D. Mineral water

Answer 1

Answer: (C)

Rain water

Rainwater is considered to be the purest form of natural water as it directly comes from the condensation of water droplets. During vaporization by the sun, the water evaporates from oceans, seas, rivers leaving behind all the impurities and salts and form the cloud.

So, option $C$ is correct.