submitting relational values of a post type to custom field of another post type

Hi,
I’m preparing a small quiz module.
This is my code

<!-- New Post Form -->
<div id="postbox">
<form id="new_post" name="new_post" method="post" action="">
<p><label for="title">Title</label><br />
<input type="hidden" id="title" value="<?php the_title(); ?>" tabindex="1" size="20" name="title" />
</p>
<?php
$my_array = get_custom_field('selectquestions:to_array');
foreach ($my_array as $item) {
	$args = array(
	'p'      => $item,
	'order'    => 'ASC'
	);
	echo '<h5>'.get_the_title($item) . '</h5><br>';
	echo '<input type="radio" value="A" id="opt_A" name="opt_'.$item.'" />'.get_post_meta($item, 'textoptiona', true).'<br>';
	echo '<input type="radio" value="B" id="opt_B" name="opt_'.$item.'" />'.get_post_meta($item, 'textoptionb', true).'<br><hr>';
} ?>

<input type="submit" value="Post Review" tabindex="40" id="submit" name="submit" />
<input type="hidden" name="action" value="new_post" />
<?php wp_nonce_field( 'new-post' ); ?>
</form>
</div>
<!-- New Post Form ENDS -->

which displays
question 1
[radio] Option A
[radio] Option B

question 2
[radio] Option A
[radio] Option B

and so on..

now I want the values submitted by user to be stored somthing like this

[id of question1][option selected by user][right option of question1],
[id of question2][option selected by user][right option of question2],… and so on in one field.

or any other way to store options so that a report can be generated at end ?

Thanks in Advance

http://wordpress.org/extend/plugins/custom-content-type-manager/