When a solution of mixture having two inorganic salts was treated with freshly prepared ferrous sulphate in acidic medium, a dark brown ring was formed whereas on treatment with neutral $$\mathrm{FeCl}_{3}$$, it gave deep red colour which disppeared on boiling and a brown red ppt was formed. The mixture contains :

Thin layer chromatography of a mixture shows the following observation:

The correct order of elution in the silica gel column chromatography is

'X' is

For compound having the formula $$\mathrm{GaAlCl}_{4}$$, the correct option from the following is :