Apex domains cannot have CNAME records.
Question and response
Question
dig ns1.bh-hosting.com. NS
Answer
ns1.bh-hosting.com. 5 NS ns100.bh-hosting.com.
ns1.bh-hosting.com. 5 NS ns1.global.ba.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0