Which statement is INCORRECT about decision tree algorithms? In decision tree algorithm, pre$-$classified target variables must be included in training set. C$4\mathrm{.}5$ decision tree algorithm produces a separate branch for each categorical value at the split node. In decision tree algorithm, the fully grown tree always has higher or equal training accuracy than pruned trees. In decision tree algorithm, the fully grown tree always has higher or equal testing accuracy than pruned trees.