Using prefix and suffix form api layout
I think you want to keep it in table. Lets try with putting it in one like this --

$form['orange'] = array(
    '#type'=&gt;'select',
    '#title' =&gt; t('Select Orange'),
    '#options' =&gt; $Orange,
    '#multiple' =&gt; false,
    '#prefix' =&gt; '&lt;table&gt;&lt;tr&gt;&lt;td&gt;',
    '#suffix' =&gt; '&lt;/td&gt;',
    '#attributes'=&gt;array('size'=&gt;0),
    '#required' =&gt; TRUE,
);
$form['apple'] = array(
    '#type'=&gt;'select',
    '#title' =&gt; t('Select apple'),
    '#options' =&gt; $apple,
    '#multiple' =&gt; false,
    '#prefix' =&gt; '&lt;td&gt;',
    '#suffix' =&gt; '&lt;/td&gt;',
    '#attributes'=&gt;array('size'=&gt;0),
    '#required' =&gt; TRUE,
);
$form['strawberry'] = array(
    '#type'=&gt;'select',
    '#title' =&gt; t('Select strawberry'),
    '#options' =&gt; $strawberry,
    '#multiple' =&gt; false,
    '#prefix' =&gt; '&lt;td&gt;',
    '#suffix' =&gt; '&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;',
    '#attributes'=&gt;array('size'=&gt;0),
    '#required' =&gt; TRUE,

);


I haven't tested this code, so please try this &amp; let me know if it works :)