array of condition

<?php 

$result_no = 5;
$cond = array(
   array(1=>'ชาย', '15', 'ก', 'a', 1),
   array(1=>'ชาย', '15', 'ก', 'b', 2),
   array(1=>'ชาย', '15', 'ก', 'c', 3),
   array(1=>'ชาย', '15', 'ข', 'a', 4),
  );
$choice = array(
   1=>array('ชาย','หญิง',''),  array('15','16',''),  array('ก','ข',''),  array('a','b'),
  );

$ans = array(1=>'ชาย', '15', 'ก', 'c');
foreach($cond as $c){
  $result = $c[$result_no]; unset($c[$result_no]);
  if ($c == $ans) { echo  $result; break; }
}