#include&lt;stdio.h&gt;   #include&lt;sys/types.h&gt;   #include&lt;sys/socket.h&gt;   int main&#40;&#41;   &#123;       int fd_socket;       if&#40;socket&#40;AF_UNIX,SOCK_STREAM,0&#41; == -1&#41;           perror&#40;&quot;socket&quot;&#41;;       return 0;   &#125;
A. TCP/IP
B. UDP
C. both (a) and (b)
D. none of mentioned
Answer:A
#include&lt;stdio.h&gt;   #include&lt;sys/types.h&gt;   #include&lt;sys/socket.h&gt;   int main&#40;&#41;   &#123;       int fd_socket;       if&#40;socket&#40;AF_UNIX,SOCK_STREAM,0&#41; == -1&#41;           perror&#40;&quot;socket&quot;&#41;;       return 0;   &#125;
A. TCP/IP B. UDP C. both (a) and (b) D. none of mentioned
Explanation:None.