The halides of alkaline earth metals form hydrates such as $MgCl_2 \cdot 6H_2O$,$CaCl_2 \cdot 6H_2O$,$BaCl_2 \cdot 2H_2O$,and $SrCl_2 \cdot 2H_2O$. What does this indicate about the halides of group $2$ elements?
- AThey are hygroscopic in nature.
- BThey act as dehydrating agents.
- CThey can absorb moisture from the air.
- DAll of the above.
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