Correct Answer - Option 1 : Sunday

Year 2005 and 2006 are not leap years.

Implies,

18th February 2005 to 17th February 2006 = 365 days

18th February 2006 to 17th February 2007 = 365 days

Total number of days = 365 + 365 + 1 (18th Feb 2007) = 731 days.

731 ÷ 7 = 104 weeks 3 days.

104 week will end on Thursday.

Hence, the three days after that would be Friday, Saturday, and Sunday.

Hence, 18th February 2007 will be a Sunday.