Apex domains cannot have CNAME records.
Question and response
Question
dig np. NS
Answer
np. 5 NS np.cctld.authdns.ripe.net.
np. 5 NS shikhar.mos.com.np.
np. 5 NS np-ns.npix.net.np.
np. 5 NS ns4.apnic.net.
np. 5 NS pch.nnic.np.
Authority
The response has no authority records.
Additional
ns4.apnic.net. 5 A 202.12.31.53
pch.nnic.np. 154480 A 204.61.216.11
np-ns.npix.net.np. 161210 A 198.32.126.50
shikhar.mos.com.np. 171834 A 27.111.31.5
ns4.apnic.net. 5 AAAA 2001:dd8:12:0:0:0:0:53
pch.nnic.np. 154480 AAAA 2001:500:14:6011:ad:0:0:1
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0