Apex domains cannot have CNAME records.
Question and response
Question
dig linhost03.utic.net.ba. NS
Answer
linhost03.utic.net.ba. 5 NS ns2.linhost03.utic.net.ba.
linhost03.utic.net.ba. 5 NS ns1.linhost03.utic.net.ba.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0