A) The Earth gets shifted out of orbit every four year
B) The revolution slows down a little once every four years
C) The length of a year is not an integer number of days
D) It is a convention
Correct Answer: C
Solution :
Number of days in a year is 365 days and 6 hours (It is not a complete day). Having years of 365 days makes the year too short. To keep up with the real length of the year maintaining an integer number of days, an extra day is added every four years.
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