Which of the following pairs of reactants will furnish butan`-2-ol` after reacting in dry ether and undergoing subsequent hydropysis?
A. `CH_(3)COCH_(3) and CH_(3)Mgl`
B. `CH_(3)CH_(2)CHO and CH_(3)MgI`
C. `CH_(3)CH_(2)COCH_(3) and CH_(3)MgI`
D. `CH_(3)CHO and CH_(3)MgI(2 "moles")`