What will be the output of the following PHP code?
<?php
$a1 = array(“a” => “red”, “b” => “green”, “c” => “blue”, “d” => “yellow”);
$a2 = array(“e” => “red”,”f” => “green”, “g” => “blue”);
$result = array_intersect($a1, $a2);
print_r($result);
?>
a) Array ( [a] => red [b] => green [c] => blue )
b) Array ( [a] => red [b] => green [c] => blue [d] => yellow )
c) Array ( [e] => red [f] => green [g] => blue )
d) Array ( [a] => red [b] => green [c] => blue [d] => yellow [e] => red [f] => green [g] => blue )

Answer: a
Explanation: The function array_intersect() compares the values of two (or more) arrays, and returns the matches. So, in the above program values of a1 and a2 will be compared and the values present in both the arrays will be the returned.