First write a program to put the data in xml file in a custom object in this way

In the place of string str place your file here

here book__c is a custom object

public class Book

{

 public static void recordReplicator(Book__c[] book)

  {

   String str = '<books><book author="Manoj">Foo bar</book>' +'<book             author="Mysti">Baz</book></books>';

    XmlStreamReader reader = new XmlStreamReader(str);

    while(reader.hasNext())

     {

        if (reader.getEventType() == XmlTag.CHARACTERS)

        {

          for (Book__c b:book)

           {

               b.book_author__c = reader.getText();

               b.Name=reader.getText();

            }

          System.debug('Text :::' + reader.getText());

       }

         reader.next();

      }

        System.debug('Inside Book record replicator'+book);

  }

 }

Trigger on Book class

Setup->App setup->create->objects->book

In trigger section->add

trigger BookTrigger on Book__c (before insert) {

Book.recordReplicator(Trigger.new);

then the data is updated in the custom object.

from there write the following in apex page 

<apex:selectList size='1'><apex:selectOptions value="{!bookoptions}"/></apex:selectList>

in the controller

List<book__c> books=new List<book__c>();  

List<SelectOption> stateoptions = new List<SelectOption>();  

   
  books=[Select b.Name From book__c b];           
   String name1 ;    
  for(Integer j=0;j<books.size();j++)     
  {      
   name1=(books.get(j)).Name;        
   bookoptions.add(new SelectOption(name1,name1));      
  }    

public List<SelectOption> getStateoptions()   
 {   
  return stateoptions;   
 }