Q.

Assertion: Detergents are better cleansing agent than soaps.

Reason: It is because they work with soft water.

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.

(3)

Detergents are better cleansing agents than soaps because they can work both in hard and soft water.