Explanation:
In a complete tree, every node has 2 children, except the last level (the leaves).
A complete tree with 1 level has 1 node.
A complete tree with 2 levels has 1 + 2 = 3 nodes.
A complete tree with 3 levels has 1 + 2 + 4 = 7 nodes.
A complete tree with 4 levels has 1 + 2 + 4 + 8 = 15 nodes.
A complete tree with h levels has 2ʰ − 1 nodes.
A complete tree with 1 node has 1 leaf.
A complete tree with 3 nodes has 2 leaves.
A complete tree with 7 nodes has 4 leaves.
A complete tree with 15 nodes has 8 leaves.
A complete tree with n nodes has (n + 1) / 2 leaves.
B is true, A is false.
