Export

I exported a course which contain some multiple choice questions. The course was exported without any problems. However, when I imported this course the questions were properly imported but answers (choices) are not imported. Is this a bug? I checked the exported xml file and did not find answers to multiple choice questions. For example,

<item>
 <title>What is 2 + 3 = ?</title>
 <link>http://localhost/tuition/questions/what-is-2-3/</link>
 <pubDate>Wed, 19 Jul 2017 05:01:11 +0000</pubDate>
 <dc:creator>prasad</dc:creator>
 <guid isPermaLink="false">http://localhost/tuition/questions/what-is-2-3/</guid>
 <description/>
 <content:encoded> </content:encoded>
 <excerpt:encoded> </excerpt:encoded>
 <wp:post_id>140</wp:post_id>
 <wp:post_date>2017-07-19 06:01:11</wp:post_date>
 <wp:post_date_gmt>2017-07-19 05:01:11</wp:post_date_gmt>
 <wp:comment_status>closed</wp:comment_status>
 <wp:ping_status>closed</wp:ping_status>
 <wp:post_name>what-is-2-3</wp:post_name>
 <wp:status>publish</wp:status>
 <wp:post_parent>0</wp:post_parent>
 <wp:menu_order>0</wp:menu_order>
 <wp:post_type>lp_question</wp:post_type>
 <wp:post_password/>
 <wp:post_author_id>1</wp:post_author_id>
 <wp:is_sticky>0</wp:is_sticky>
<wp:postmeta>
 <wp:meta_key>_lp_type</wp:meta_key>
 <wp:meta_value>multi_choice</wp:meta_value>
 </wp:postmeta>
<wp:postmeta>
 <wp:meta_key>_lp_mark</wp:meta_key>
 <wp:meta_value>1</wp:meta_value>
 </wp:postmeta>
<wp:postmeta>
 <wp:meta_key>_edit_last</wp:meta_key>
 <wp:meta_value>1</wp:meta_value>
 </wp:postmeta>
<wp:postmeta>
 <wp:meta_key>_edit_lock</wp:meta_key>
 <wp:meta_value>1500479239:1</wp:meta_value>
 </wp:postmeta>
<wp:postmeta>
 <wp:meta_key>_rpwcm_post_restriction_method</wp:meta_key>
 <wp:meta_value>none</wp:meta_value>
 </wp:postmeta>
 </item>