Apex domains cannot have CNAME records.
Question and response
Question
dig magix.com.sg. NS
Answer
magix.com.sg. 5 NS ns1.singnet.com.sg.
magix.com.sg. 5 NS ns2.singnet.com.sg.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0