which values should be assigned to the variables a b and..., PHP Basics, Zend Certification

Question:Which values should be assigned to the variables $a, $b and $c in order for the following script to display the string Hello, World!?<?php
$string = "Hello, World!";
$a = ?;
$b = ?;
$c = ?;
if($a) {
  if($b && !$c) {
    echo "Goodbye Cruel World!";
  } else if(!$b && !$c) {
    echo "Nothing here";
  }
} else {
   if(!$b){
     if(!$a && (!$b && $c)) {
        echo "Hello, World!";
     } else {
       echo "Goodbye World!";
     }
  } else {
    echo "Not quite.";
  }
}
?>

A False, True, False 
B True, True, False 
C False, True, True 
D False, False, True 
E True, True, True

/32

+ AnswerD

+ ExplanationFollowing the logic of the conditions, the only way to get to the Hello, World! string is in the else condition of the first if statement. Thus, $a must be False. Likewise, $b must be False. The final conditional relies on both previous conditions ($a and $b) being False, but insists that $c be True (Answer D).

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