Name the alkyl halide which can be used to prepare methane and ethane in single steps.

Explanation

Methyl iodide `(CH_(3)-I)." "underset("Methyl iodide")(CH_(3)-I)+HI underset("Reduction")overset("Red P, "Delta)to underset("Methane")(CH_(4))+I_(2)`
`underset("Methyl iodide")(2CH_(3)-I)+2Na underset("Wurtz reaction")overset("Dry ether")to underset("Ethane")(CH_(3)-CH_(3))+2NaI`