Alkyl iodides can be prepared by:-

R C H_{2} C O O A g + I_{2} C C l_{4} ⟶ Δ R C H_{2} I

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R C H_{2} C l + N a I a c e t o n e ⟶ Δ R C H_{2} I + N a C l

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R - O H + H I ⟶ R I + H_{2} O

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C H_{4} + I_{2} ⟶ C H_{3} I

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Solution

The correct options are
B $R - O H + H I ⟶ R I + H_{2} O$
C $R C H_{2} C l + N a I a c e t o n e ⟶ Δ R C H_{2} I + N a C l$
Alkyl halides are prepared by following reactions:
Finkelstein reaction or halogen exchange reaction:
$R C H_{2} C l + N a I a c e t o n e ⟶ Δ R C H_{2} I + N a C l$

$R - O H + H I ⟶ R I + H_{2} O$
Requires presence of sulphuric acid.
The reaction $C H_{4} + I_{2} ⟶ C H_{3} I$ is reversible and must be carried out in presence of oxidizing agents such as $H I O_{3}, H N O_{3}$ or $H I O_{4}$

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