The correct option is (b) 5
Easy explanation: The discretized form of a source-free 1-D convection problem modelled using the QUICK scheme involves the far upstream and the far downstream nodes too. Therefore, it contains extra terms than the upwind and the second-order upwind schemes. The stencil is
The discretized equation is
aP ΦP+aE ΦE+aW ΦW+aEE ΦEE+aWW ΦWW=0
It contains 5 terms.