Apex domains cannot have CNAME records.
Question and response
Question
dig com.my. NS
Answer
com.my. 5 NS ns01.trs-dns.net.
com.my. 5 NS b.nic.my.
com.my. 5 NS b.mynic.centralnic-dns.com.
com.my. 5 NS c.mynic.centralnic-dns.com.
com.my. 5 NS d.mynic.centralnic-dns.com.
com.my. 5 NS ns01.trs-dns.com.
com.my. 5 NS a.mynic.centralnic-dns.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0