mysqli_real_escape_string with array in php?

My code is like this

 public function addQuestions($data){


    $ans = array();
    $ans[1] = $data['ans1'];
    $ans[2] = $data['ans2'];
    $ans[3] = $data['ans3'];
    $ans[4] = $data['ans4'];
    $ans= mysqli_real_escape_string($this->db->link, $data[$ans]);

}

Is this right way to use array in this sql function ??