Which is NOT a valid backend-type option available when configuring an Oracle Cloud Infrastructure (OCI)...

When configuring an OCI API Gateway deployment, you need to specify the backend type for each route in your API deployment specification3. The backend type determines how the API gateway handles requests to that route and forwards them to the appropriate backend service3. The following backend types are valid options for an OCI API Gateway deployment3:

HTTP_BACKEND: The API gateway forwards requests to an HTTP or HTTPS URL as the backend service.

ORACLE_FUNCTIONS_BACKEND: The API gateway invokes an Oracle Functions function as the backend service.

STOCK_RESPONSE_BACKEND: The API gateway returns a stock response without invoking any backend service. ORACLE STREAMS_BACKEND is not a valid backend type for an OCI API Gateway deployment. Oracle Streams is a fully managed, scalable, and durable messaging service that you can use to ingest and consume large amounts of data in real-time4. However, Oracle Streams is not supported as a backend service for an OCI API Gateway deployment.