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N2O42NO2, Kc=4. This reversible reaction is studied graphically as shown in figure. Select the correct statement out of I, II and III.

I. Reaction quotient has maximum value at point A

II. Reaction proceeds left to right at a point when

     [N2O4]=[NO2]=0.1M

III. Kc=Q where point E or G is reached

(1) I,II

(2) II,III

(3) I,III

(4) I,II,III