Apex domains cannot have CNAME records.
Question and response
Question
dig lnh.edu.pk. NS
Answer
lnh.edu.pk. 5 NS julio.ns.cloudflare.com.
lnh.edu.pk. 5 NS walk.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0