Apex domains cannot have CNAME records.
Question and response
Question
dig rcil.gov.in. NS
Answer
rcil.gov.in. 4 NS ns2.rcil.gov.in.
rcil.gov.in. 4 NS ns1.rcil.gov.in.
Authority
The response has no authority records.
Additional
ns1.rcil.gov.in. 4 A 203.153.43.65
ns2.rcil.gov.in. 4 A 203.153.47.251
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0