Apex domains cannot have CNAME records.
Question and response
Question
dig registar.ro. NS
Answer
registar.ro. 5 NS ns1.claus.ro.
registar.ro. 5 NS ns2.claus.ro.
registar.ro. 5 NS ns.romania-webhosting.com.
Authority
The response has no authority records.
Additional
ns.romania-webhosting.com. 5 A 85.9.19.1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0