Given below are two statements: One is lebelled as Assertion A and the other is labelled as Reason R.
Assertion A: One loses a day when he/she crosses 180° longitude east to west.
Reason R: The sun rises in the east and sets in the west and two places that are 15 degree of longitude apart have a difference of 1 hour.
In the light of the above statements, choose the correct answer from the options given below