Apex domains cannot have CNAME records.
Question and response
Question
dig ccsgroupindia.com. NS
Answer
ccsgroupindia.com. 5 NS ns-141.awsdns-17.com.
ccsgroupindia.com. 5 NS ns-1307.awsdns-35.org.
ccsgroupindia.com. 5 NS ns-1751.awsdns-26.co.uk.
ccsgroupindia.com. 5 NS ns-118.awsdns-14.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0