#include &lt;stdio.h&gt;    #define foo(x, y) #x #y    int main&#40;&#41;    &#123;        printf&#40;&quot;%s\n&quot;, foo&#40;k, l&#41;&#41;;        return 0;    &#125;
A. kl
B. k l
C. xy
D. Compile time error
Answer:A
#include &lt;stdio.h&gt;    #define foo(x, y) #x #y    int main&#40;&#41;    &#123;        printf&#40;&quot;%s\n&quot;, foo&#40;k, l&#41;&#41;;        return 0;    &#125;
A. kl B. k l C. xy D. Compile time error