what is the output for following code php array 10 20..., PHP Arrays, PHP

Question:What is the output for the following code?<?php 
$array = array(10,20, 30, 40);
array_shift($array); 
print_r($array); 
?>

A [0]=> 20, [1]=> 30, [2]=> 40 
B [0]=> 10, [1]=> 20, [2]=> 30 
C [0]=> 30, [1]=> 40, [2]=> 10 
D [0]=> 40, [1]=> 30, [2]=> 20

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Question:What is the output for the following code?<?php $array = array(10,20, 30, 40); array_shift($array); print_r($array); ?>