A hypothetical gaseous reversible reaction Ag⇌Bg+Cg is carried out at   9 Kelvin. The correct relation between Kp and Kc is (Units of Kp are ‘atm’ and Kc are ‘mole/lit’)

At 12.18 K, Kp = Kc irrespective of the value of ∆ng ;KpKc=RT∆ng; When T=1R=10.0821=12.18 K, KpKc=1 irrespective of the value of ∆ng;Above 12.18 K, Kp > Kc when ∆ng>0 ;Above 12.18 K, Kp < Kc when ∆ng<0 ;Below 12.18 K, Kp < Kc when ∆ng>0 ;Below 12.18 K, Kp > Kc when ∆ng<0 ;