&lt;?php    function b&#40;&#41;    &#123;        echo &quot;b is executed&quot;;    &#125;    function a&#40;&#41;    &#123;        b&#40;&#41;;        echo &quot;a is executed&quot;;        b&#40;&#41;;    &#125;    a&#40;&#41;;  ?&gt;
A. b is executedb is executedb is executed
B. b is executeda is executed
C. a is executed
D. b is executeda is executedb is executed
Answer:A
&lt;?php    function b&#40;&#41;    &#123;        echo &quot;b is executed&quot;;    &#125;    function a&#40;&#41;    &#123;        b&#40;&#41;;        echo &quot;a is executed&quot;;        b&#40;&#41;;    &#125;    a&#40;&#41;;  ?&gt;
A. b is executedb is executedb is executed B. b is executeda is executed C. a is executed D. b is executeda is executedb is executed
Explanation: Simple order of execution.