BST to Sorted Linked List

In this problem we have done postorder traversal but not inorder Why??? and what is the intution behind using postorder instead of inorder

hi @manchandagitansh4_b5d09b65db5085fd here u need to connect the root to left and right part so u need the place where to connect so get answers from left and right first and then connect root, and this can be done by post order