#include&lt;stdio.h&gt;   #include&lt;netinet/in.h&gt;   #include&lt;sys/types.h&gt;   #include&lt;sys/socket.h&gt;&nbsp;   int main&#40;&#41;   &#123;       int fd_client,fd, len;       struct sockaddr_in add_server;       fd_client = socket&#40;AF_INET,SOCK_STREAM,0&#41;;       if &#40;fd_client == -1&#41;&#123;           perror&#40;&quot;fd_sock&quot;&#41;;           exit&#40;1&#41;;       &#125;       add_server.sin_family = AF_INET;       add_server.sin_port = ntohs&#40;4001&#41;;       add_server.sin_addr.s_addr = inet_addr&#40;&quot;144.29.8.2&quot;&#41;;       len = sizeof&#40;add_server&#41;;       fd  = connect&#40;fd_client,&#40;struct sockaddr*&#41;&amp;add_server,len&#41;;       return 0;   &#125;
A. IPv4
B. IPv6
C. both (a) and (b)
D. none of the mentioned
Answer:A
#include&lt;stdio.h&gt;   #include&lt;netinet/in.h&gt;   #include&lt;sys/types.h&gt;   #include&lt;sys/socket.h&gt;&nbsp;   int main&#40;&#41;   &#123;       int fd_client,fd, len;       struct sockaddr_in add_server;       fd_client = socket&#40;AF_INET,SOCK_STREAM,0&#41;;       if &#40;fd_client == -1&#41;&#123;           perror&#40;&quot;fd_sock&quot;&#41;;           exit&#40;1&#41;;       &#125;       add_server.sin_family = AF_INET;       add_server.sin_port = ntohs&#40;4001&#41;;       add_server.sin_addr.s_addr = inet_addr&#40;&quot;144.29.8.2&quot;&#41;;       len = sizeof&#40;add_server&#41;;       fd  = connect&#40;fd_client,&#40;struct sockaddr*&#41;&amp;add_server,len&#41;;       return 0;   &#125;
A. IPv4 B. IPv6 C. both (a) and (b) D. none of the mentioned
Explanation:None.