Apex domains cannot have CNAME records.
Question and response
Question
dig zydexindustries.com. NS
Answer
zydexindustries.com. 5 NS ns1.103-174-103-109.cprapid.com.
zydexindustries.com. 5 NS ns2.103-174-103-109.cprapid.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0