The ratio of the diffusion rates of two gases is given by the formula Start Fraction r subscript 1 baseline over r subscript 2 baseline End Fraction equals Start Fraction Start Root m subscript 2 baseline End Root over Start Root m subscript 1 baseline End Root End Fractionwhere m subscript 1and m subscript 2are the masses of the molecules of the gases. Find Start Fraction r subscript 1 baseline over r subscript 2 baseline End Fraction if m subscript 1 baseline equals 12 units and m subscript 2 baseline equals 30 units. Your answer should be in simplified radical form.
A. Start Fraction Start Root 5 End Root over 6 End Fraction
B. Start Fraction Start Root 10 End Root over 2 End Fraction
C. Start Fraction Start Root 3 End Root over 5 End Fraction
D. Start Fraction 2 Start Root 6 End Root over 5 End Fraction

I choose B. can someone just tell me if I chose correctly?