Recent Post of Particular Parent Category

 Wordpress List Recent Post of Particular Parent Category

<?php $query = new WP_Query( 'category_name=blog&posts_per_page=5' );?>

    <ul>
<?php while ( $query->have_posts() ) : $query->the_post(); ?>
      <li> <a href="<?php the_permalink() ?>"><?php the_title();  ?> </a></li>
 <?php endwhile;?>
    </ul>