what is the output php array pic10 jpg pic20 pic30 pic40..., PHP Arrays, PHP

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Question:What is the output?<?php
$array = array("pic10.jpg","pic20.jpg","pic30.jpg","pic40.jpg","pic5.jpg");
Natsort ($array);
print_r($array);
?>

A Array ( [0] => pic5.jpg [1] => pic10.jpg [2] => pic20.jpg [3] => pic30.jpg [4] => pic40.jpg ) 
B Array ( [4] => pic5.jpg [0] => pic10.jpg [1] => pic20.jpg [2] => pic30.jpg [3] => pic40.jpg ) 
C Array ( [4] => pic40.jpg [3] => pic30.jpg [2] => pic20.jpg [1] => pic10.jpg [0] => pic5.jpg ) 
D None

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Question:What is the output?<?php $array = array("pic10.jpg","pic20.jpg","pic30.jpg","pic40.jpg","pic5.jpg"); Natsort ($array); print_r($array); ?>

A Array ( [0] => pic5.jpg [1] => pic10.jpg [2] => pic20.jpg [3] => pic30.jpg [4] => pic40.jpg )

B Array ( [4] => pic5.jpg [0] => pic10.jpg [1] => pic20.jpg [2] => pic30.jpg [3] => pic40.jpg )

C Array ( [4] => pic40.jpg [3] => pic30.jpg [2] => pic20.jpg [1] => pic10.jpg [0] => pic5.jpg )

D None

B

Question:What is the output?
<?php $array = array("pic10.jpg","pic20.jpg","pic30.jpg","pic40.jpg","pic5.jpg"); Natsort ($array); print_r($array); ?>