In each of the following, total pressure set - up at equilibrium is assumed to be equal and is P atm with equilibrium constants `K_(p)` given `:`
`I: CaCO_(3)(s)hArr CaO(s)+CO_(2)(g),K_(1)`
`II : NH_(4)HS(s)hArr NH_(3)(g)+H_(2)S(g),K_(2)`
`III : NH_(2)CO_(2)NH_(4)(s)hArr 2NH_(3)(g) +CO_(2)(g),K_(3)`
In the increasing order `:`
A. `K_(1)=K_(2)=K_(3)`
B. `K_(1)ltK_(2)ltK_(3)`
C. `K_(3)ltK_(2)ltK_(1)`
D. None