how to add the radio button intead of checkbox in tableselect drupal 7
As per Adding checkboxes to a table, you need to set #multiple on the element:

$form['table'] = array(
  '#type' =&gt; 'tableselect',
  '#header' =&gt; $header,
  '#options' =&gt; $options,
  '#multiple' =&gt; FALSE,
);