A black body radiates power P and maximum energy is radiated by it around a wavelength ${\lambda }_0$ . The temperature of the black body is now changed such that it radiates maximum energy around the wavelength $\frac{3{\lambda }_0}{4}$  The power radiated by it now is :

• A

  $\frac{256}{81}P$

• B

  $\frac{27}{64}P$

• C

  $\frac{64}{27}P$

• D

  $\frac{81}{256}P$