Apex domains cannot have CNAME records.
Question and response
Question
dig adbizindia.com. NS
Answer
adbizindia.com. 5 NS ns-1232.awsdns-26.org.
adbizindia.com. 5 NS ns-1991.awsdns-56.co.uk.
adbizindia.com. 5 NS ns-338.awsdns-42.com.
adbizindia.com. 5 NS ns-797.awsdns-35.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0