AIIMS 2017 Chemistry Grignard Reagents MCQ Question

The reaction of cyclohexene with N-BromoSuccinimide (NBS) leads to bromination at the allylic position, forming an allylic bromide. When this allylic bromide is treated with magnesium, a Grignard reagent is generated, which then reacts with acetonitrile (CH₃CN) to form an intermediate that undergoes hydrolysis to yield 1-cyclohexyl-2-butanone (ketone). Other options are incorrect as they likely do not represent the correct structure or functional groups resulting from the described reaction sequence. Understanding the mechanism of allylic bromination and Grignard reagent formation is crucial for predicting the final product in such organic transformations.