Following two equilibrium is simultaneously established in a container PCl₅(g)⇌PCl₃(g)+Cl₂(g) CO(g)+Cl₂(g)⇌COCl₂(g) If some Ni(s) is introduced in the container forming Ni(CO)₄(g) then at new equilibrium A. PCl₃ concentration will increase B. PCl₃ concentration will decrease C. Cl₂ concentration will remain same D. CO concentration will remain same