1.

Best method out of the given to prepare B is

Answer»

`H-OVERSET(O)overset(||)(C)-Cloverset(MeMgBr)to`
`H-overset(O)overset(||)(C)-Cloverset(Me_(2)CD)to`
`H-overset(O)overset(||)(C)-OMeoverset(MeMgCL)to`
`H-overset(O)overset(||)(C)-O Meoverset(Me_(2)Cd)to`

Solution :


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