Q. Consider the following statements:Assertion (A) :To orbit around Sun,the planet Mars takes lesser time than taken by the Earth.Reason (R) : The diameter of the planet Mars is less than that of the Earth.In the context of above two statements, Which one of the following is correct ?   

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