The largest entry in a node $\frac{\frac{?}{?}}{N}\text{'}$s right subtree is

the subtree's leftmost node

the subtree's rightmost node

the left child of $\frac{\frac{?}{?}}{N})$

the right child of $\frac{\frac{?}{?}}{\frac{N}{\frac{?}{?}}}$