Apex domains cannot have CNAME records.
Question and response
Question
dig vinay-test1.com. NS
Answer
vinay-test1.com. 1 NS ns2.vinay-test1.com.
vinay-test1.com. 1 NS ns1.vinay-test1.com.
Authority
The response has no authority records.
Additional
ns1.vinay-test1.com. 1 A 95.141.43.71
ns2.vinay-test1.com. 1 A 95.141.43.73
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0