Directions: The following items consist of two statements, one labelled as 'Assertion (A)' and the other labelled as 'Reason (R)'. You are to examine these two statements carefully and decide if the Assertion (A) and the Reason (R) are individually true and if so, whether the reason is a correct explanation of the Assertion. Select your answer to these items using the codes given below. Assertion (A) : The location of the epicenter of an earthquake may be estimated using the time-leg between the arrival of 'P' and 'S' waves. Reason (A) : The 'L' wave cannot start until the 'P' wave hits the surface.