#include &lt;stdio.h&gt;    typedef struct p *q;    struct p    &#123;        int x;        char y;        q ptr;    &#125;;    typedef struct p *q;    int main&#40;&#41;    &#123;        struct p p = &#123;1, 2, &amp;p&#125;;        printf&#40;&quot;%d\n&quot;, p.ptr-&gt;x&#41;;        return 0;    &#125;
A. Compile time error
B. 1
C. Undefined behaviour
D. Address of p
Answer:A
#include &lt;stdio.h&gt;    typedef struct p *q;    struct p    &#123;        int x;        char y;        q ptr;    &#125;;    typedef struct p *q;    int main&#40;&#41;    &#123;        struct p p = &#123;1, 2, &amp;p&#125;;        printf&#40;&quot;%d\n&quot;, p.ptr-&gt;x&#41;;        return 0;    &#125;
A. Compile time error B. 1 C. Undefined behaviour D. Address of p