Q.

Assertion: Photosynthesis is considered as an exothermic reaction.
Reason: Photosynthesis is an endothermic reaction because sunlight energy is absorbed by green plants during this process.

1 Both assertion and reason are correct and reason is the correct explanation of assertion.  
2 Both assertion and reason are correct, but reason is not the correct explanation of assertion.  
3 Assertion is true, but reason is false.  
4 Assertion is false, but reason is true  

Ans.

(4)

Photosynthesis is an endothermic reaction because it requires absorption of sunlight energy.