Assertion (A) : Fishes survive in ponds even when the atmospheric temperature is below 0°C.

Reason (R) : The anomalous expansion of water helps in preserving aquatic life.

1. both A and R are true and R is the correct explanation of A
2. both A and R are true and R is not the correct explanation of A
3. assertion is false but reason is true
4. assertion is true but reason is false

What do you mean by green house effect?

Which of the following solar radiations pass through the atmosphere of the earth?

X-rays, ultraviolet rays, visible light rays, infrared radiation.

Name the radiations which are absorbed by the green house gases.