Answer :
CH3OH does not form a Grignard reagent because it lacks a halide group necessary to react with magnesium; instead, it has a hydroxyl group that would decompose a Grignard reagent.
The compound that does NOT form a Grignard reagent with magnesium in the presence of ether is CH3OH (option b). Grignard reagents are typically formed by the reaction of an alkyl or aryl halide with magnesium in an ether solvent. CH3OH, which is methanol, does not have a halide group required to react with Mg to form a Grignard reagent. Instead, methanol contains a hydroxyl group which would actually react with a Grignard reagent if one were present, leading to the decomposition of the reagent.
Alcohols like CH3CH2OH (option d) also do not form Grignard reagents due to the presence of a hydroxyl group which is likewise not reactive with magnesium in the formation of Grignard reagents.
