Which of the following reagents are required to prepare $3$-ethylpentan-$3$-ol?

  • A
    $CH_3CH_2MgBr + CH_3COCH_2CH_3$
  • B
    $CH_3MgBr + CH_3CH_2CH_2COCH_2CH_3$
  • C
    $CH_3CH_2MgBr + CH_3CH_2COCH_2CH_3$
  • D
    $CH_3CH_2CH_2MgBr + CH_3COCH_2CH_3$

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