displaying default values in picklist in a vf page

Question

I had used picklist values Quote type field in Quote:

<apex:inputField value="{!Qt.Quote_Type__c}"/>

I had 3 values a,b,c. I had three quote types i had made 'a' as default value for Quote type and 'b' for Quote type1 and 'c' for Quote type2, but i am not getting default values displaying in vf page. Please some one tell how can i display default values.