Apex domains cannot have CNAME records.
Question and response
Question
dig actcorp.co.in. NS
Answer
actcorp.co.in. 5 NS ns-548.awsdns-04.net.
actcorp.co.in. 5 NS ns-1267.awsdns-30.org.
actcorp.co.in. 5 NS ns-1939.awsdns-50.co.uk.
actcorp.co.in. 5 NS ns-169.awsdns-21.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0