$\left[P t\left(N H_{3}\right)_{5} C l\right] C l_{3}$ on ionization gives 4 ions in solution i.e $3 C l^{-}+\left[P t\left(N H_{3}\right)_{5} C l\right]^{+}$
$(A)$ $\left[ Ni \left( H _{2} O \right)_{2}( en )_{2}\right]^{2+}$
$(B)$ $\left[ Ni \left( H _{2} O \right)_{4}(\text { en })\right]^{2+}$ અને
$(C)$ $\left[ Ni ( en )_{3}\right]^{2+}$