Two blocks of masses 3 kg and 5 kg are connected by a metal wire going over a smooth pulley. The breaking stress of the metal is $$\frac{24}{\pi} \times 10^2$$ N m$$^{-2}$$. What is the minimum radius of the wire?

(take g = 10 m s$$^{-2}$$)

A

1250 cm

B

1.25 cm

C

125 cm

D

12.5 cm