You cannot meet Google at a POP and your on‑prem router cannot run BGP. Which Cloud Interconnect model should you use?

Partner Interconnect with a layer-3 partner is the correct choice because it addresses both constraints. Since you cannot meet Google at a Point of Presence (POP), Dedicated Interconnect and Direct Peering are not options, as they require direct physical connections to Google's network. Your on-prem router's inability to run BGP eliminates Partner Interconnect with a layer-2 partner, which requires your router to establish a BGP session with Google. A layer-3 partner handles the BGP session with Google on your behalf, providing you with a routed connection without needing BGP on your end.