Which of the following are correctly matched

Options

A. `Be(OH)_(2) lt Mg (OH)_(2) gt Ca(OH)_(2) gt Ba(OH)_(2)` [Basic strength]
B. `Be(OH)^(2) gt Mg(OH)^(2) gt Ca (OH)^(2) lt Sr(OH)_(2)` (Thermal stability)
C. `BeO gt MgO gt CaO gt SrO` (Basic strength)
D. `BeSO_(4) lt SrSO_(4) lt BaSO_(4) lt CaSO_(4)` (solubility in `H_(2)O)`

Answer

A

Explanation

Basic strength of metal hydroxides increases down the group II group metal.
The solubility of sulphides in water decreases from Be to Ba
Basic strength of II group metal oxides increase down the group