Apex domains cannot have CNAME records.
Question and response
Question
dig lalitabisht.com. NS
Answer
lalitabisht.com. 5 NS ns-1797.awsdns-32.co.uk.
lalitabisht.com. 5 NS ns-1309.awsdns-35.org.
lalitabisht.com. 5 NS ns-1111.awsdns-10.org.
lalitabisht.com. 5 NS ns-1863.awsdns-40.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0