register_activation_hook( __FILE__, 'insert_page' );

function insert_page(){
// Create post object
$my_post = array(
  'post_title'    => 'Menu',
  'post_content'  => 'Short Code',
  'post_status'   => 'publish',
  'post_author'   => get_current_user_id(),
  'post_type'     => 'page',
);

// Insert the post into the database
wp_insert_post( $my_post, '' );
 $newvalue = wp_insert_post( $post, false );
update_option( 'Menu', $newvalue );
}
register_deactivation_hook( __FILE__, 'deactivate_plugin' );

function deactivate_plugin() {

$page = get_page_by_title('Menu');
wp_delete_post($page);

}