#include&lt;stdio.h&gt;   #include&lt;signal.h&gt;   #include&lt;stdlib.h&gt;&nbsp;   void response &#40;int&#41;;   void response &#40;int sig_no&#41;   &#123;       printf&#40;&quot;%s\n&quot;,sys_siglist&#91;sig_no&#93;&#41;;       printf&#40;&quot;This is singal handler\n&quot;&#41;;   &#125;   int main&#40;&#41;   &#123;       pid_t child;       int status;       child = fork&#40;&#41;;       switch &#40;child&#41;&#123;           case -1 :               perror&#40;&quot;fork&quot;&#41;;               exit &#40;1&#41;;           case 0 :               kill&#40;getppid&#40;&#41;,SIGKILL&#41;;               printf&#40;&quot;I am an orphan process because my parent has been killed by me\n&quot;&#41;;               printf&#40;&quot;Handler failed\n&quot;&#41;;               break;           default :               signal&#40;SIGKILL,response&#41;;               wait&#40;&amp;status&#41;;               printf&#40;&quot;The parent process is still alive\n&quot;&#41;;               break;       &#125;       return 0;   &#125;
A. the child process kills the parent process
B. the parent process kills the child process
C. handler function executes as the signal arrives to the parent process
D. none of the mentioned
Answer:A
#include&lt;stdio.h&gt;   #include&lt;signal.h&gt;   #include&lt;stdlib.h&gt;&nbsp;   void response &#40;int&#41;;   void response &#40;int sig_no&#41;   &#123;       printf&#40;&quot;%s\n&quot;,sys_siglist&#91;sig_no&#93;&#41;;       printf&#40;&quot;This is singal handler\n&quot;&#41;;   &#125;   int main&#40;&#41;   &#123;       pid_t child;       int status;       child = fork&#40;&#41;;       switch &#40;child&#41;&#123;           case -1 :               perror&#40;&quot;fork&quot;&#41;;               exit &#40;1&#41;;           case 0 :               kill&#40;getppid&#40;&#41;,SIGKILL&#41;;               printf&#40;&quot;I am an orphan process because my parent has been killed by me\n&quot;&#41;;               printf&#40;&quot;Handler failed\n&quot;&#41;;               break;           default :               signal&#40;SIGKILL,response&#41;;               wait&#40;&amp;status&#41;;               printf&#40;&quot;The parent process is still alive\n&quot;&#41;;               break;       &#125;       return 0;   &#125;
A. the child process kills the parent process B. the parent process kills the child process C. handler function executes as the signal arrives to the parent process D. none of the mentioned
Explanation:The SIGKILL signal can not be handled by singal handler function.