10 March 2015 is Monday. Ordinary year has 1 odd day while leap year has 2 odd days. 10 March 2012 was a leap year No. of odd days between 10 March 2011 to 10 March 2015 = 2 + 1 + 1 + 1 = 5 odd days So, Monday - 5 odd days = Wednesday Hence, the correct answer is Wednesday.