Which of the following statement is correct for \( \mathrm{P} \) zone refining? W (1) Based on f...

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Which of the following statement is correct for
\( \mathrm{P} \)
zone refining?
W
(1) Based on fractional crystallisation method
(2) Greater solubility of the impurity in the molten state than in the solid
(3) This method is used for \( \mathrm{Si}, \mathrm{Ge} \) and \( \mathrm{Ga} \).
(4) All above are correct
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