#include &lt;stdio.h&gt;    int main&#40;&#41;    &#123;        printf&#40;&quot;Hello World! %d \n&quot;, x&#41;;        return 0;    &#125;
A. Hello World! x;
B. Hello World! followed by a junk value
C. Compile time error
D. Hello World!
Answer:A
#include &lt;stdio.h&gt;    int main&#40;&#41;    &#123;        printf&#40;&quot;Hello World! %d \n&quot;, x&#41;;        return 0;    &#125;
A. Hello World! x; B. Hello World! followed by a junk value C. Compile time error D. Hello World!
Explanation:It results in an error since x is used without declaring the variable x.