The smallest entry in a node $\backslash ($ N $\backslash )\text{'}$s right subtree is $\_\_\_\_\_\_\_\_\_.$

Question $2$ options:

the subtree's leftmost node

the left child of $\backslash ($ N $\backslash )$

the subtree's rightmost node

the right child of $\backslash ($ N $\backslash )$