One mole mixture of `CH_4` and air (containing 80% `N_2` 20 % `O_2` by volume ) of a composition such that when underwent combustion gave maximum heat (assume combustion of only `CH_4`).Then which of the statements are correct , regarding composition of initial mixture ? (X presents mole fraction )
A. `X_(CH_4)=1/11, X_(O_2)=2/11,X_(N_2)=8/11`
B. `X_(CH_4)=3/8, X_(O_2)=1/8,X_(N_2)=1/2`
C. `X_(CH_4)=1/6, X_(O_2)=1/6,X_(N_2)=2/3`
D. Data insufficient