What will be the output of the following PHP code?<?phpfunction

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What will be the output of the following PHP code?

<?php
function m()
    {
        echo "m is executed...";
    }
function n()
    {
        m();
        echo "\nn is executed... \n";
        m();
    }
n();
?>

1. Error
2. m is executed...
3. n is executed...
4. m is executed...
  n is executed...
5. m is executed...
  n is executed...
  m is executed...

Correct Option: E

Simple order of execution.