Shamita's birthday was on 15 March 2020, which was a Sunday. If her husband's birthday was on 31 May 2020, on which day would it fall?

March has 31 days, April has 30 days, and May has 31 days. Total days from March 15 to May 31: = 16 days (March) + 30 days (April) + 31 days (May) = 77 days Now, since 77 is divisible by 7 (7 days in a week), the day of the week will remain the same. Shamita's birthday was on a Sunday. Adding 77 days (which is a multiple of 7) to a Sunday will still be a Sunday. So, Shamita's husband's birthday, on May 31, 2020, would also fall on a Sunday. Thus, the correct answer is option 2. Sunday.