changing my answer, Only smart card can do MFA for Adminstrator. read the question carefully it’s said horizon console for admin. RSA and Radius are for end user MFA. https://docs.vmware.com/en/VMware-Horizon/2203/horizon-console-administration/GUID-2A035E01-599A-4A2E-8265-2DE014AB7244.htm

https://docs.vmware.com/en/VMware-Horizon-7/7.13/horizon-console-administration/GUID-42FE829B-C000-4DF6-840A-2EF711A2B2C6.html

RSA SecureID: RSA SecureID is a well-established two-factor authentication solution. It combines something the user knows (a PIN or password) with something the user has (a hardware or software token). The administrator can configure Horizon Console to use RSA SecureID for strong authentication. Recommended choice for implementing two-factor authentication. RADIUS: RADIUS (Remote Authentication Dial-In User Service): RADIUS is a protocol used for centralized authentication, authorization, and accounting (AAA). It supports various authentication methods, including two-factor authentication. The administrator can set up RADIUS authentication for Horizon Console. While it’s a valid option, RSA SecureID is more commonly associated with robust two-factor authentication. A good alternative, especially if RSA SecureID is not available. In summary, the senior Horizon administrator should choose C. RSA SecureID for its proven track record in providing effective two-factor authentication

both RSA SecureID and RADIUS provide robust two-factor authentication options for securing access to the Horizon Console. The administrator can choose the one that best fits their organization’s requirements. 2-Factor Authentication: disabled, RSA, Radius enabling 2FA on Horizon 2312 supports either RSA secureID, Smart cards, or Radius, and is configured under advanced authentication in connection server properties. https://docs.vmware.com/en/VMware-Horizon/2312/horizon-console-administration/GUID-42FE829B-C000-4DF6-840A-2EF711A2B2C6.html

https://docs.vmware.com/en/VMware-Horizon-7/7.13/horizon-administration/GUID-71458AA2-E2A2-43AC-85D1-35404AF09B79.html