#include &lt;stdio.h&gt;    void main&#40;&#41;    &#123;        int x = 4;        int *p = &amp;x;        int *k = p++;        int r = p - k;        printf&#40;&quot;%d&quot;, r&#41;;    &#125;
A. 4
B. 8
C. 1
D. Run time error
Answer:A
#include &lt;stdio.h&gt;    void main&#40;&#41;    &#123;        int x = 4;        int *p = &amp;x;        int *k = p++;        int r = p - k;        printf&#40;&quot;%d&quot;, r&#41;;    &#125;
A. 4 B. 8 C. 1 D. Run time error