[bisser]

Can LAH do the same? ( replacing -CL with -H)

 i don't quite  understand the mechanism.

and are there any alternative ways in doing so?

thanks

[movies]

Yes, LAH can displace good leaving groups to make alkanes.  It is probably most common with mesylates or tosylates.

[formamide]

I would prepare the chloride intermediate, J, using PCl3, then react with Mg to get the Grignard reagent in THF, then quench with D2O. Advantage- D2O is much cheaper than LAD.