Apex domains cannot have CNAME records.
Question and response
Question
dig amoxycillin1st.com. NS
Answer
amoxycillin1st.com. 4 NS ns1.amoxycillin1st.com.
amoxycillin1st.com. 4 NS ns2.amoxycillin1st.com.
Authority
The response has no authority records.
Additional
ns1.amoxycillin1st.com. 4 A 86.111.188.92
ns2.amoxycillin1st.com. 4 A 185.9.157.51
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0