If 15th Feb 2010 is Monday, then what will be the day of the week on 7th July 2011?

Correct option is D

Given - If 15th Feb 2010 is Monday, then what will be the day of the week on 7th July 2011?

odd days in years - 2010 to 2011 = 1 odd day
odd days in days - 15 feb to 7 july
total days feb (28 - 15) + mar (31) + apr (30) + may (31) + jun (30) + jul (7) = 142 days
odd days = 142/7 = 2 odd days
total odd days = 1 + 2 = 3
day = Monday + 3 = Thursday

Thursday is the day of the week on 7th July 2011

hence option d is correct.