DNS server and IP configure

Dear Sir,

I have a question and doubt in my mind

I want setup a company website hosting server in my office, so I have purchased 2 static IP from ISP 110.234.196.204 and 110.234.196.205.

I have installed two Servers in My Office One DNS server and One IIS server and other networking equipment as like as firewall , switches, router etc.

I am register my domain myoffice.com with IP address 110.234.196.205. with ns name “ns1-myoffice.com”

Kindly tell me that Which IP for my DNS server or which IP for IIS Server ???

My DNS server as forwarded dns server is required ??