what is the output of following php code php define foo..., PHP Variables and Datatypes , PHP

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Question:What is the output of the following PHP code?

<?php

    define('FOO', 10);

    $array = array(10 => FOO,   "FOO" => 20);

    print $array[$array[FOO]] * $array["FOO"];

?>

A FOO 
B 100 
C 200 
D 20 
E 10

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Question:What is the output of the following PHP code? <?php define('FOO', 10); $array = array(10 => FOO, "FOO" => 20); print $array[$array[FOO]] * $array["FOO"]; ?>

A FOO

B 100

C 200

D 20

E 10

C