Apex domains cannot have CNAME records.
Question and response
Question
dig njalla.no. NS
Answer
njalla.no. 5 NS ns1.njal.la.
njalla.no. 5 NS ns2.njal.la.
njalla.no. 5 NS 1-you.njalla.no.
Authority
The response has no authority records.
Additional
ns1.njal.la. 5 A 95.215.19.5
ns2.njal.la. 5 A 185.193.124.34
1-you.njalla.no. 5 A 185.193.124.2
ns1.njal.la. 5 AAAA 2001:67c:2354:2:0:0:0:5
ns2.njal.la. 5 AAAA 2001:67c:235c:0:0:0:0:34
1-you.njalla.no. 5 AAAA 2001:67c:235c:0:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0