You might like to change your display name to "Gopu Lilly".
However, in answer to your question, your problem lies in that you've defined a hardcoded display. In real life, you'd normally be setting the display from a backing bean and probably setting the backing bean from the display as well.
Like so:
The default value would be whichever value you'd initialized carBean.currentCar to. I've copied an example that uses the selectItems tag instead of individual selectItem's, but operation is identical.
Here's a good place for JSF tag usage examples:
http://www.exadel.com/tutorial/jsf/jsftags-guide.html