How to display only one category using the_category()?

Hi,

Let’s say I have a post that in the “Subcategory” category which is a child of “Main” category. Using the_category(' ', multiple, $post_id) in the loop I get something like:
Main Subcategory Main

Is there a way to only display child category that this post belongs to? I would like to have only Subcategory link, without the double “Main” stuff.