DIRECTION for the question: Solve the following question and mark the best possible option.

Which one of the following number is divisible by 3?

A number is divisible by 3 if the sum of its digits is divisible by 3.

Option A: 2345678 $$\Rightarrow$$ Sum of digits = 35 $$\Rightarrow$$ Not divisible by 3

Option B: 2876423 $$\Rightarrow$$ Sum of digits = 32 $$\Rightarrow$$ Not divisible by 3

Option C: 4006020 $$\Rightarrow$$ Sum of digits = 12 $$\Rightarrow$$ Divisible by 3

Option D: 9566003 $$\Rightarrow$$ Sum of digits = 29 $$\Rightarrow$$ Not divisible by 3

Option E: 3456785 $$\Rightarrow$$ Sum of digits = 38 $$\Rightarrow$$ Not divisible by 3

Hence, option C is the correct choice.