Phosphine is obtained by the reaction when:

White phosphorus is heated with $N a O H$ .

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$C a_{3} P_{2}$ reacts with water.

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Red phosphorus is heated with $N a O H$ .

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Phosphorus is heated in a current of hydrogen.

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Solution

The correct option is B
$C a_{3} P_{2}$ reacts with water.

$P_{4} + 3 N a O H + 3 H_{2} O ⟶ P H_{3} ↑ + 3 N a H_{2} P O_{2}$

$C a_{3} P_{2} + 6 H_{2} O ⟶ 3 C a (O H)_{2} + 2 P H_{3} ↑$

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