&lt;?php    function sum&#40;$num1, $num2&#41;    &#123;        $total = $num1 + $num2;        echo &quot;chr($total)&quot;;     &#125;    $var1 = &quot;sum&quot;;    $var1&#40;5, 44&#41;;    ?&gt;
A. Error
B. 49
C. 1
D. sum
Answer:A
&lt;?php    function sum&#40;$num1, $num2&#41;    &#123;        $total = $num1 + $num2;        echo &quot;chr($total)&quot;;     &#125;    $var1 = &quot;sum&quot;;    $var1&#40;5, 44&#41;;    ?&gt;
A. Error B. 49 C. 1 D. sum
Explanation: It is possible to call a function using a variable which stores the function name also the chr() function returns a character from the specified ASCII value.