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Reason: $He$ is soluble in blood.
| Time | T | $\infty$ |
| $\mathbf{P}_{\text {system }}$ | $\mathrm{P}_{\mathrm{t}}$ | $\mathrm{P}_{\infty}$ |
$(A)$ $\left[ Cr \left( NH _3\right)_5 Cl ^2 Cl _2\right.$ and $\left[ Cr \left( NH _3\right)_4 Cl _2\right) Cl$
$(B)$ $\left[ Co \left( NH _3\right)_4 Cl _2\right]^{+}$and $\left[ Pt \left( NH _3\right)_2\left( H _2 O \right) Cl \right]^{+}$
$(C)$ $\left[ CoBr _2 Cl _2\right]^{2-}$ and $\left[ PtBr _2 Cl _2\right]^{2-}$
$(D)$ $\left[ Pt \left( NH _3\right)_3\left( NO _3\right) Cl\right.$ and $\left[ Pt \left( NH _3\right)_3 Cl \right] Br$
$(i)$ $\left[ M ( NCS )_{6}\right]^{(-6+ n )}$
$(ii)$ $\left[ MF _{6}\right]^{(-6+ n )}$
$(iii)$ $\left[ M \left( NH _{3}\right)_{6}\right]^{ n ^{+}}$
