Apex domains cannot have CNAME records.
Question and response
Question
dig action.group. NS
Answer
action.group. 5 NS ns1.fr.ru.
action.group. 5 NS ns2.fr.ru.
Authority
The response has no authority records.
Additional
ns1.fr.ru. 5 A 85.119.149.30
ns2.fr.ru. 5 A 91.214.116.107
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0