Which of the following lines would you expect to see in the file /etc/services?

This format does not correspond to an entry in /etc/services; it resembles a configuration entry for a specific daemon or a name service switch.

This line is characteristic of a service definition found in /etc/inetd.conf or /etc/xinetd.d/tftp, used for configuring services managed by a super-server, not /etc/services.

The line 'tftp 69/udp' correctly follows the format of the /etc/services file, mapping the service name 'tftp' to its standard port number 69 and specifying the UDP protocol.

The line 'udp 17 UDP' is incorrect; port 17 is for the QOTD service, and the format is inconsistent with /etc/services (e.g., it should be 'qotd 17/udp').