Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R.
Assertion A : The sun rises 2 hours later in Gujrat as compared to Arunachal Pradesh, but watches shows the same time.
Reason R : The longitudinal gap between Arunachal Pradesh and Gujarat is about 30 degrees but at the same time India has adopted Indian Standard time which is at 82.5° West.
In the light of the above statements, choose the most appropriate answer from the options given below :