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

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What will be the output of the following PHP code ?
```
<?php
$p = -2;
$q = 2;
$r = $p * $q + $r;
echo $r;
?>
```

1. Undefined variable
2. Undefined variable: r -4
3. 2
4. -2
5. None of these

Correct Option: B

Since the variable r is not defined it returns the error also it takes r as 0 and returns the value -4.