If Kinetic Energy of a body is increasing, then          

${\mathrm{W}}_{\mathrm{c}}+{\mathrm{W}}_{\mathrm{nc}}+{\mathrm{W}}_{\mathrm{ext}}={\mathrm{K}}_{\mathrm{f}}-{\mathrm{K}}_i$

If the Kinetic energy of a body is Increasing work done by conservative force may be positive or zero

Work done by Non – conservative forces may be zero

So all options are concluding relevant to the concept.