A bag contains 3 white, 2 black and 4 red balls. Three balls are drawn in succession Without replacement. The probability that of the three balls drawn one is white, one is black and one is red, is

A

$$\frac{1}{21}$$

B

$$\frac{1}{25}$$

C

$$\frac{1}{28}$$

D

$$\frac{1}{32}$$