For the system  If the activation energy for the forward step is 100 kcal/mol.What is the ratio of temperature at which the forward and backward reaction shows the same % change of rate constant per degree rise of temperature ? (1 cal= 4.2 J)

(A) $\sqrt{0.72}$

(B) $\sqrt{0.84}$

(C) $\sqrt{0.42}$

(D) $\sqrt{1}$

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