Three resistors each of 4 Ω are connected together to form a network. The equivalent resistance of the network cannot be

If all are in series, then Req = 12  ΩIf all are in parallel, then Req = 43  Ω=1.33 ΩIf two are in series and parallel with third, thenReq = 83=2.6  ΩIf two are in parallel and series with third, thenReq = 6 Ω