SAML as identity provider in Okta while using SAML protocol in Azure AD

Hi Guys.
I have configured my application in Azure Active directory. for SAML 2.0 protocol. In the developer’s community they have mentioned that if I have to use Azure AD as an IDP I have to select OpenId Connect as the identity provider. What should i select if I want to use Azure Ad as my IDP configured with SAML 2.0 protocol and Okta as the service provider, what doI have to select as IDP and what will be the subsequent steps?