The gas `A_(2)` in the left flask allowed to react with gas `B_(2)` present in right flask as `A_(2)(g)+B_(2)(g)hArr2AB(g),K_(c)=4` at `27^(@)C.` What is the concentrartion of AB when equilibrium is established ?
A. `1.33` M
B. `2.66` M
C. `0.66` M
D. `0.33` M