The conductivity of the intrinsic germanium at $$300^\circ$$K is . When, $$n_{i}$$; at $$300^\circ K = 2.5 X 10^{13}/cm$$ and $$\mu_{n}$$, and $$\mu_{p}$$, in germanium are 3800 and 1800 cm$$^2$$/Vs respectively.

A

0.224 S/cm

B

0.0224 S/cm

C

2.24 S/cm

D

0.00224 S/cm