What will be the output of the following PHP code?
<?php
$face = array (“A”, “J”, “Q”, “K”);
$number = array (“2″,”3″,”4”, “5”, “6”, “7”, “8”, “9”, “10”);
$cards = array_merge ($face, $number);
print_r ($cards);
?>
a) Array ( [0] => A [1] => J [2] => Q [3] => K [4] => 2 [5] => 3 [6] => 4 [7] => 5 [8] => 6 [9] => 7 [10] => 8 [11] => 9 [12] => 10 )
b) Array ( [0] => A [1] => 2 [2] => J [3] => 3 [4] => Q [5] => 4 [6] => K [7] => 5 [8] => 6 [9] => 7 [10] => 8 [11] => 9 [12] => 10 )
c) Error
d) Array ( [0] => 2 [1] => 3 [2] => 4 [3] => 5 [4] => 6 [5] => 7 [6] => 8 [7] => 9 [8] => 10 [9] => A [10] => J [11] => Q [12] => K )

Answer: a
Explanation: The array_merge() function merges one or more arrays into one array. The resulting array will begin with the first input array parameter, appending each subsequent array parameter in the order of appearance.