Reduction of Alkyl Halide

Q.

By the reduction of alkyl halides, we get alkanes. The best alkyl halide is

1. Fluoride

2. Bromide

3. Chloride

4. Iodide

Q.
In the reaction, [X] will be :

1. ${\mathrm{LiAlH}}_4$
2. ${\mathrm{NaBH}}_4$
3. ${\mathrm{Bu}}_3\mathrm{SnH}$
4. All