What will be the output of the following PHP code ?<?php$Str

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What will be the output of the following PHP code ?

<?php
$Str = array("Ajit" => "23", "Ats" => "21", "Aju" => "22");
ksort($Str);
foreach($Str as $s => $s_value)
{
    echo "Key=" . $s . ", Value=" . $s_value;
    echo "\n";
}
?>

1. Error
2. Nothing
3. Key=Ajit, Value=23
  Key=Aju, Value=22
  Key=Ats, Value=21
4. Key=Ajit, Value=23
  Key=Ats, Value=21
  Key=Aju, Value=22
5. None of these

Correct Option: C

The ksort() function sorts an associative array in ascending order, according to the key.