Apex domains cannot have CNAME records.
Question and response
Question
dig registry.qa. NS
Answer
registry.qa. 5 NS ns2.registry.qa.
registry.qa. 5 NS ns1.registry.qa.
Authority
The response has no authority records.
Additional
ns1.registry.qa. 5 A 178.23.16.104
ns2.registry.qa. 5 A 178.23.17.104
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0