Box A contains 2 black and 3 red balls, while box B contains 3 black and 4 red balls . Out of these two boxes one is selected at random, and the proability of choosing box A is double that of box B. if a red ball is drawn from the selected box then the proability that is has come from box B is

Options

A. `21//41`
B. `10//31`
C. `12//31`
D. `13//41`

Answer

B