" To prepare "3" -ethylpentan- "3" -ol,the reagents needed are "

To prepare 3-ethylpentan-3-ol, the reactants needed are

The reagents needed to convert :

4-cyano-4-ethylpentan-3-one

Which ketone will form 3- ethylpentan -3-ol on treatment with ethy1 magnesium bromide ?

Which of the following compounds gives 3-ethylpentan-3-ol by the action of ethy magnesium iodide followed by acid hydrolysis?