Apex domains cannot have CNAME records.
Question and response
Question
dig takaful.com.pk. NS
Answer
takaful.com.pk. 4 NS ns5.cyber.net.pk.
takaful.com.pk. 4 NS csns3.cyber.net.pk.
takaful.com.pk. 4 NS ns1.cyber.net.pk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0