Q. What will be the output of the following PHP code?

$number = array(0,1,two,three,four,5);
$num = preg_grep("/[0-5]/", $number);
print_r($num);

• Array([0]=>0 [1]=>1 [2]=>two [3]=>three [4]=>four [5]=>5)
• Array([2]=>two [3]=>three [4]=>four)
• Array([1]=> 1)
• Array([0]=>0 [1]=>1 [5]=>5)

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