What is false for most alkyl halides?

An alkyl halide by formation of its Grignard ragent and heating with water givs propane. What is the original alkyl halides

An alkyl halide after forming the corresponding Grignard reagent and heating with water yeilds propane. What is the original alkyl halide ?

An alkyl halide after forming the corresponding Grignard reagent and heating with water yeilds propane. What is the original alkyl halide ?

Which of the following statement is FALSE for alkyl halides ?