The Henry's law constant for the solubility of $$N_{2}$$ gas in water at 298 K is $$1.0\times10^{5}$$ atm. The mole fraction of $$N_{2}$$ in air is 0.8. The number of moles of $$N_{2}$$ from air dissolved in 10 moles of water at 298 K and 5 atm pressure is -

A

$$4.0\times10^{-4}$$

B

$$4.0\times10^{-5}$$

C

$$5.0\times10^{-4}$$

D

$$4.0\times10^{-6}$$