Which of the following statements is NOT true about decision trees?

Question $24$ options:

$1)$

If the attribute tested at a tree node is nominal, the number of children is always two $($i$.$e$.,$ either true or false$).$

$2)$

If the attribute tested at a tree node is numeric, the test determines based on equality and$/$or inequality operators $($including equal to$,$ less than, greater than, and a combination of them$).$

$3)$

Missing values pose an obvious problem since it is unclear which branch should be taken.

$4)$

To classify an unknown instance, it is routed down the tree according to the values of the attributes tested in successive nodes.