Apex domains cannot have CNAME records.
Question and response
Question
dig monsterindia.com. NS
Answer
monsterindia.com. 5 NS ns-785.awsdns-34.net.
monsterindia.com. 5 NS ns-1639.awsdns-12.co.uk.
monsterindia.com. 5 NS ns-449.awsdns-56.com.
monsterindia.com. 5 NS ns-1468.awsdns-55.org.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0