Q.

Assertion: The human eye is one of the most valuable and sensitive sense organs.
Reason: Eye enables us to see the wonderful world and the colours around us.

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.

(1)

We know that human eye is the most valuable sense organ because it enables us to see this colourful world. Thus, both assertion and reason are correct and reason is the correct explanation of assertion.