Apex domains cannot have CNAME records.
Question and response
Question
dig connect.net.PK. NS
Answer
connect.net.pk. 5 NS ns1.connect.net.pk.
connect.net.pk. 5 NS ns2.connect.net.pk.
connect.net.pk. 5 NS dns.connect.net.pk.
Authority
The response has no authority records.
Additional
ns1.connect.net.pk. 5 A 118.103.239.9
ns2.connect.net.pk. 5 A 118.103.239.7
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0