Explanation:

Correct option 1 : Sunday

In any two consecutive ordinary years, the same calendar date advances by one weekday each year.
For example:

• 15th October 2008 = Wednesday

• 15th October 2009 = Thursday

• 15th October 2010 = Friday

• 15th October 2011 = Saturday

However, if a leap year follows an ordinary year, the weekday for any date from March to December in the leap year will be two days ahead of the same date in the previous year.
Example:

• 15th October 2011 = Saturday (ordinary year)

• 15th October 2012 = Monday (leap year — two days ahead)

Also, the previous day to 15th October 2012 was:

• 14th October 2012 = Sunday