The values of \(K_{P_1}\) and \(K_{P_2}\) for the reactions X ⇌ Y + Z and A ⇌ 2B are in the ratio 9 : 1 if degree of dissociation and initial concentration of X and A be equal then total pressure at equilibrium P1, and P2 are in the ratio
(a) 36: 1
(b) 1: 1
(c) 3: 1
(d) 1: 9