Observe the given figure carefully and fill in the blanks.
P. The total height of tree X and tree Z is ________ 
.
Q. Tree Y is ________ taller than tree W.
R. Tree ________ is the tallest.
| P | Q | R | |
|---|---|---|---|
| A | 10 | 2 | Y |
| B | 11 | 2 | X |
| C | 10 | 3 | Z |
| D | 11 | 1 | X |
YOU are wrong