Correct Answer - Option 4 : Thursday
Given date: 8th December 2016
Let us break the year 2016 = 2000 years + 15 years (3 leap year + 12 ordinary year) + 1 year upto 8th December
Odd days in these years = 0 + (2 × 3 + 1 × 12) + 0 = 0 + 18 + 0 = 18 odd days or 4 odd days
Day on the odd days:
0 - Sunday
1 - Monday
2 - Tuesday
3 - Wednesday
4 - Thursday
5 - Friday
6 - Saturday
Hence, Thursday is correct.
NOTE:
Calculation of odd days in a given year.
To find total odd days in 2016 (leap year) = Remainder (No. of days in a month ÷ 7)
Jan = 3, Feb = 1 (leap year), Mar = 3, Apr = 2, May = 3, Jun = 2, July = 3, Aug = 3, Sep = 2, Oct = 3, Nov = 2, Dec = 1
Total odd days = 3 + 1 + 3 + 2 + 3 + 2 + 3 + 3 + 2 + 3 + 2 + 1 = 28 odd days or 0 odd days.