Listener question

below is the question related to Listener, for which the answer given was option C, but i think the correct answer is Option B. Please clarify ??

You have just run this syntax to start the listener from the Listener Control utility:

LSNRCTL>START
Starting /mstgelai/oracle/bin/tnslsnr: please wait... System parameter file is /u01/oracle/network/admin/listener.ora Log messages written to /u01/oracle/network/log/listener.log Listening on:
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=stc-sun01-server)(PORT=1521)))

Connecting to...
The command completed successfully

What is the name of the Listener you started? (B listener, se si chiamasse altrimenti dovrei specificare listener start nome:listener)

1. TNSLSNR
2. LISTENER
3. LOCAL_LISTENER
4. DEFAULT_LSRN