#include &lt;stdio.h&gt;    int f&#40;char chr, ...&#41;;    int main&#40;&#41;    &#123;        char c = 97;        f&#40;c&#41;;        return 0;    &#125;    int f&#40;char c, ...&#41;    &#123;        printf&#40;&quot;%c\n&quot;, c&#41;;    &#125;
A. Compile time error
B. Undefined behaviour
C. 97
D. a
Answer:A
#include &lt;stdio.h&gt;    int f&#40;char chr, ...&#41;;    int main&#40;&#41;    &#123;        char c = 97;        f&#40;c&#41;;        return 0;    &#125;    int f&#40;char c, ...&#41;    &#123;        printf&#40;&quot;%c\n&quot;, c&#41;;    &#125;
A. Compile time error B. Undefined behaviour C. 97 D. a