2,3-dimethyl butanoic acid can be obtained from dry ice using

Options

A. `CH_(3)-underset(CH_(3))underset(|)(C)H-underset(CH_(3))underset(|)(C)H-MgBr`
B. `CH_(3)-underset(C_(2)H_(5))underset(|)(C)H-CH_(2)-MgBr`
C. `C_(2)H_(5)-CH_(2)MgBr`
D. `CH_(3)-underset(CH_(3))underset(|)(C)H-CH_(2)MgBr`

Answer

A

Explanation

`CH_(3)-overset(CH_(3))overset(|)(C)H-overset(CH_(3))overset(|)(C)HMgBr+overset(O)overset(||)(C)=Ooverset("ether")(rarr)underset(H^(+))overset(H-OH)(rarr)`