&lt;?phpfunction one&#40;&#41;&#123;    echo &quot; this works&quot;;    function two&#40;&#41;    &#123;        echo &quot;this too works&quot;;    &#125;&#125;one&#40;&#41;;two&#40;&#41;;?&gt;
A. Error
B. this works
C. this worksthis too works
D. this works this too works
Answer:A
&lt;?phpfunction one&#40;&#41;&#123;    echo &quot; this works&quot;;    function two&#40;&#41;    &#123;        echo &quot;this too works&quot;;    &#125;&#125;one&#40;&#41;;two&#40;&#41;;?&gt;
A. Error B. this works C. this worksthis too works D. this works this too works
Explanation: Two is declared in one and is called after one.Hence it works.