<?php $related = array(); ?>
<?php while (have_posts()) : the_post(); ?>
    <?php if(get_post_type() == 'Type_B' || get_post_type() == 'Type_C'){
        array_push($related, $post);
        continue;
    } ?>
<?php endwhile; ?>

if($related->have_posts()){
    while($related->have_posts()) { $related->the_post();
        print_r($post);
    }
}