PHP Quiz (Question and Answer) - Function

This is set of multiple choice question PHP function. Please write your answer in comment section.

A) Type Hinting was introduce in which vesion of PHP ?

1. PHP 5
2. PHP 5.4
3. PHP 4
4. PHP 7

B) What will be the output of the follwing code.

<?php

    function calculation($price, $GST="")

    {

        $total = $price + ($price * $GST);

        echo "$total"; 

    }

    calculation(42); 

    ?>

1. Error
2. 0
3. 42
4. 21

C) What will be the output of following PHP Code. 

1. 
   <?php
   
       function abc()  
   
       {
   
           function bcd()
   
           {
   
               echo 'I am bcd';
   
     }
   
           echo 'I am abc';
   
       }
   
       bcd();
   
       abc();
   
       ?>
   
   
   
   
   
   

1. I am bcd
2. I am abc
3. Error
4. I am bcd I am abc
5. I am abc I am bcd

Please Friends Write your answer in comment section.

Thank You