Apex domains cannot have CNAME records.
Question and response
Question
dig obit.RU. NS
Answer
obit.RU. 5 NS dns1.obit.RU.
obit.RU. 5 NS dns2.obit.RU.
Authority
The response has no authority records.
Additional
dns1.obit.RU. 5 A 85.114.0.82
dns2.obit.RU. 5 A 85.114.2.82
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0