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what is the output of below script?

<?php
$x = 3;
switch ($x) {
case 2: echo 'line 1'; break;
case 3:
case 4: echo 'line 2'; break;
default: echo 'line 3';
}
?>

a. echo 'line 3';
b. echo 'line 2';
c. Error
d. None of the above

Ans: b (Answer is line2)

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