What will be the output of the following PHP code?

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

A. 1 and 2 B. 2 and 4 C. 1 and 4 D. 2 and 3

A. p+ B. p* C. P? D. p#

A. [A-Za-z0-9] B. [A-za-z] C. [A-z] D. [a-z]

A. 7 B. 8 C. 9 D. 10