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Question

Grignard reagent is usually prepared by :

RX+MgEt2O−−RMgX Grignard reagent

ArX+MgEt2O−−ArMgX Grignard reagent

Grignard reagent acts as a strong base. Grignard reagent carry out nucleophilic attack in absence of acidic hydrogen. Grignard reagent form complex with its ether solvent. Complex formation with molecule of ether is an important factor in the formation and stability of Grignard reagent.

How many different Grignard reagents when react with EtOH, give nbutane as product (excluding stereoisomerism)

A
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B
2
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C
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D
4
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