*Correct Answer :- 0* Explanation: ⇒ To find the remainder when a number is divided by 9, it is enough to find the remainder when the digital sum of the number is divided by 9 ⇒ Here the given number is (888.....repeat 63 times) ⇒ Digital sum of (888.....repeat 63 times) = 63 × 8 ⇒ Here the digital sum is a multiple of 63; where 63 is a multiple of 9 ⇒ So, this given number is a multiple of 9 and will leave the remainder as 0 when divided by 9 ⇒ Thus, option C is the correct answer.