Reaction between acetone and methyl magnesium chloride followed by hydrolysis will give:

\(\mathrm{iso}-\mathrm{propyl}\mathrm{alcohol}\)

\(\sec -\mathrm{butyl}\mathrm{alcohol}\)

\(\mathrm{tert}-\mathrm{butyl}\mathrm{alcohol}\)

\(\mathrm{iso}-\mathrm{butyl}\mathrm{alcohol}\)