Apex domains cannot have CNAME records.
Question and response
Question
dig risp.pl. NS
Answer
risp.pl. 4 NS ns2.q3.pl.
risp.pl. 4 NS ns1.q3.pl.
Authority
The response has no authority records.
Additional
ns1.q3.pl. 4 A 91.195.134.254
ns2.q3.pl. 4 A 195.3.203.4
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0