Correct Answer - Option 1 : Friday
Given,
It was Sunday on January 1st, 2006
So,
31st December 2005 is Saturday
Number of odd days from 2006 to 2009 = 1 + 1 + 2 + 1 = 5
31st December 2009 is Thursday.
So, 1st January, 2010 is Friday.
Hence, “Friday” is the correct answer.