For , , Kf and Kb respectively are 0.25 and 5000 at 400K. Now, Kc for same process at 500K may be

A + B ⇌C + D, ΔH = -QKJAt 400 K Kf = 0.25; Kb = 5000   the reaction is exothermic at higher temperature, 500 K value of Keq will be lesser thanBy inspection option (1) is the only value which is lesser than