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<?php 
$args = array(
  'orderby' => 'name',
  'parent' => ENTER_PARENT_CAT_ID_HERE,
  'taxonomy' => 'category',
  'hide_empty' => 1 ,
  'number' => '1'
  );
$categories = get_categories( $args );
$content='';
foreach ( $categories as $category ) {
    echo '<a href="' . get_category_link( $category->term_id ) . '">' . $category->name . '</a><br/>';
    
}
?>