Correct Answer: Sunday

Solution : Given:
30 ^th April 1983 was Saturday.

Calculate the number of days between April 30, 1983 and August 13, 1989.
Number of remaining days in 1983 ⇒ May = 31; June = 30; July =31; August = 31; September = 30; October = 31; November = 30; December = 31
⇒ 31 + 30 + 31 + 31 + 30 + 31 + 30 + 31 = 245
From 1984 to 1988 ⇒ (5 × 365) + 2 = 1825 + 2 = 1827
(2 days are being added as there are two leap years 1984 and 1988)
From Jan 1, 1989 to August 13, 1989 ⇒ Jan = 31; Feb = 28; March = 31; April = 30; May = 31; June = 30; July = 31; August = 13
⇒ 31 + 28 + 31 + 30 + 31 + 30 + 31 + 13 = 225
Total number of days = 245 + 1827 + 225 = 2297
On dividing 2297 by 7, we get 1 as the remainder. So, add 1 day to Saturday, we will get Sunday.

So, 13th August 1989 will be Sunday. Hence, the second option is correct.