php query_posts syntax error (should be very easy:-)

Hi everyone,

I have this line in my index.php for getting all the posts from a certain category:

<?php query_posts('category_name=categoryname&posts_per_page=4'); ?>

I have this in my home made theme options:

// Ask for category on homepage
array( "name" => "Category home:",
 "desc" => "Enter the name of the category you want to display on the home page",
 "id" => $shortname."_category_home",
 "type" => "text",
 "std" => ""),

Now, I want the user to input the name of the category, and this should be filled in in the first line.
I came up with this:

<?php query_posts('category_name=echo $options['category_home']&posts_per_page=4'); ?>

This gives me a syntax error, can someone help please?

Thanks in advance !