A binary min-heap H has its level order traversal as 5, 10, 8, 12, 20, 70, 21, 35, 32, 23. If an element 9 is inserted into H, then the post-order traversal of H will be
1
35, 32, 23, 20, 12, 10, 70, 21, 9, 8, 5
2
35, 32, 12, 23, 20, 10, 9, 70, 21, 8, 5
3
35, 12, 32, 9, 23, 10, 20, 5, 70, 21, 8
4
35, 32, 12, 23, 20, 9, 10, 70, 21, 8, 5