Which sequence of steps describes the best synthesis of $2-$methyl$-3-$pentanone?

• A
  $(1)$ $1-$Propanol $+ (CH_3)_2CHMgBr$,diethyl ether
  $(2)$ $H_3O^{+}$
  $(3)$ $PCC, CH_2Cl_2$
• B
  $(1)$ $1-$Propanol $+ Na_2Cr_2O_7, H_2SO_4, H_2O$,heat
  $(2)$ $SOCl_2$
  $(3)$ $(CH_3)_2CHCl, AlCl_3$
• C
  $(1)$ $1-$Propanol $+ PCC, CH_2Cl_2$
  $(2)$ $(CH_3)_2CHLi$,diethyl ether
  $(3)$ $H_3O^{+}$
  $(4)$ $Na_2Cr_2O_7, H_2SO_4, H_2O$,heat
• D
  $(1)$ $2-$Propanol $+ Na_2Cr_2O_7, H_2SO_4, H_2O$,heat
  $(2)$ $CH_3CH_2CH_2Li$,diethyl ether
  $(3)$ $H_3O^{+}$
  $(4)$ $PCC, CH_2Cl_2$