Answer
Please see the work below.
Work Step by Step
We know that:
(a) $Ca_3(PO_4)_2$ is insoluble.
(b) $Mn(OH)_2$ is insoluble.
(c) $AgClO_3$ is soluble.
(d) $K_2S$ is soluble.
These results can be found using the rules of solubility.
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