If a and b are integers greater than 200 such that a + b = 600, which of the following could be the exact ratio of a to b?

for, 3 to 2,
600 × 3/(3 + 2) = 360; which is greater than 200. This maybe the correct answer.

for, 5 to 2,
600 × 2/(5 + 2) = 171.43; which is less than 200. This is not the correct answer.

for, 7 to 3,
600 × 3/(7 + 3) = 180; which is less than 200. This is not the correct answer.

for, 9 to 1,
600 × 1/(9 + 1) = 60; which is less than 200. This is not the correct answer.