$Ba$,$Ca$,and $Sr$ form halide hydrates. Their formulas are $BaCl_2 \cdot x H_2 O$,$CaCl_2 \cdot y H_2 O$,and $SrCl_2 \cdot z H_2 O$. The values of $x$,$y$,and $z$ respectively are:

  • A
    $2, 6, 6$
  • B
    $8, 6, 2$
  • C
    $8, 6, 6$
  • D
    $6, 4, 2$

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