A radionuclide of atomic mass $$300\text{ amu}$$ on fission liberates $$200\text{ MeV}$$ of energy. The energy liberated when $$1\text{ g}$$ of this radionuclide undergoes fission is (given Avogadro number $$= 6 \times 10^{23}$$)

A

$$6.4 \times 10^{10}\text{ J}$$

B

$$6.4 \times 10^{11}\text{ J}$$

C

$$6.4 \times 10^{12}\text{ J}$$

D

$$6.4 \times 10^{13}\text{ J}$$