Cobalt chloride when dissolved in water forms pink colored complex \(X\) which has octahedral geometry. This solution on treating with cone \(HCl\) forms deep blue complex, Y which has a \(Z\) geometry. \(X , Y\) and \(Z\), respectively, are

1. A \(X =\left[ Co \left( H _2 O \right)_6\right]^{2+}, Y =\left[ CoCl _4\right]^{2-}, Z =\) Tetrahedral
2. B \(X =\left[ Co \left( H _2 O _6\right)\right]^{2+}, Y =\left[ CoCl _6\right]^{3-}, Z =\) Octahedral
3. C \(X =\left[ Co \left( H _2 O \right)_6\right]^{3+}, Y =\left[ CoCl _6\right]^{3-}, Z =\) Octahedral
4. D \(X =\left[ Co \left( H _2 O \right)_4 Cl _2\right]^{+}, Y =\left[ CoCl _4\right]^{2-}, Z =\) Tetrahedral