ACompressing the gas through adiabatic process will require more work to be done.
a
${V_1} = V,{V_2} = V/2$
$On\,P - V\,diagram,$
$Area\,under\,adiabatic\,curve>Area\,under\,isothermal\,curve,$
So compressing the gas through adiabatic process will require more work to be done.
