990 + 9999 is divisible by

The correct options are
A

3

B

9

C

11

990 and 9999 are both divisible by 99. Hence, their sum is also divisible by 99.

99 is divisible by 9 and 11. 9 is divisible by 3. Hence, the sum of 990 and 9999 is divisible by 9, 11 as well as 3.