In a given race the odds in favour of three horses A, B, C are 1:3; 1:4; 1:5 respectively. Assuming that dead heat is impossible the probability that one of them wins is

A

$$\frac{7}{60}$$

B

$$\frac{37}{60}$$

C

$$\frac{1}{5}$$

D

$$\frac{1}{8}$$