&lt;?php$a = 2;if &#40;$a-- - --$a - $a&#41;    print &quot;hello&quot;;else    print &quot;hi&quot;;?&gt;
A. hi
B. hello
C. error
D. no output
Answer:A
&lt;?php$a = 2;if &#40;$a-- - --$a - $a&#41;    print &quot;hello&quot;;else    print &quot;hi&quot;;?&gt;
A. hi B. hello C. error D. no output
Explanation: Computing the expression in the if clause,it sums upto to 2 which is a positive value.