Apex domains cannot have CNAME records.
Question and response
Question
dig varghesepaul.org. NS
Answer
varghesepaul.org. 5 NS ns-250.awsdns-31.com.
varghesepaul.org. 5 NS ns-593.awsdns-10.net.
varghesepaul.org. 5 NS ns-712.awsdns-25.net.
varghesepaul.org. 5 NS ns-1939.awsdns-50.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0