In which of the following cases, the reaction goes farthest to complet

1.	In which of the following cases, the reaction goes farthest to completion ?
Answer» `AhArrB(K=10^(3))` `PHARRQ(K=10^(-2))` `A+BhArrC+D(K=10)` `X+YhArrXY_(2)(K=10^(-1))` Answer :A

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