Correct Answer - A
The hydrated chlorides, bromides and iodides of Ca, Sr, and Ba can be dehydrated by heating but those of Mg and Be suffer hydrolysis
`CaCl_(2).6H_(2)Ooverset(Delta)toCaCl_(2)+6H_(2)O`
`[Be(H_(2)O)_(4)]Cl_(2)overset(Delta)toBe(OH)_(2)+2HCl`