Correct Answer: Friday

Solution : Given:
11th August 1918 is Sunday.

Calculate the days between 11th August 1918 , and 4th December 1925.
Number of remaining days in 1918→ Aug = 31 – 11= 20; Sep = 30; Oct = 31; Nov = 30; Dec = 31
⇒ 20 + 30 + 31 + 30 + 31 = 142
From 1919 to 1924 → (6 × 365) + 2 = 2190 + 2 = 2192 (2 days are added as 1920 and 1924 are leap years.)
From 1st Jan 1925 to 4th Dec 1925 → Jan = 31; Feb = 28; Mar = 31; Apr = 30; May = 31; June = 30; July = 31; Aug = 31; Sept = 30; Oct = 31; Nov = 30; Dec = 4
⇒ 31 + 28 + 31 + 30 + 31 + 30 + 31 + 31 + 30 + 31 + 30 + 4 = 338
Total number of days = 142 + 2192 + 338 = 2672 days
On dividing 2672 by 7, we get 5 as the remainder. So, add five days to Sunday, it will be Friday.

So, 4th December 1925 will be Friday. Hence, the fourth option is correct.