Answer : Option A
Explanation :
A number, which is divisible by 3, 5, and 9, is also divisible by 45.
A number is divisible by 3 if the sum of its entire digits is divisible by 3.
A number is divisible by 9 if the sum of its entire digits is divisible by 9.
The number which ends with 0 or 5 is divisible by 5.
The number 306990 fulfils all the requirements, so the answer is 306990.