Apex domains cannot have CNAME records.
Question and response
Question
dig itrinjam.com. NS
Answer
itrinjam.com. 3 NS ns2.itrinjam.com.
itrinjam.com. 3 NS ns1.itrinjam.com.
Authority
The response has no authority records.
Additional
ns1.itrinjam.com. 3 A 107.158.144.74
ns2.itrinjam.com. 3 A 104.206.11.114
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0