Single post author code:
<?php if (option::get('post_author') == 'on') { ?>
<div class="post_author">
<?php echo get_avatar( get_the_author_meta('ID'), 70 ); ?>
<span><?php _e('Author:', 'wpzoom'); ?>
<?php
// custom script for retrieving question author name -- i added
// get post type
$gpt=get_post_type($post->ID);
if ($gpt=="question")
{
the_author();
}
// end of my editing
?>
<?php the_author_posts_link(); ?></span>
<?php the_author_meta('description'); ?>
<?php } ?>