Oracle AI Database@Azure has a default regional service limit of five delegated subnets . Once a deployment requires more than five delegated subnet links in a region, the customer must request a service-limit increase.

This aggregate regional limit must not be confused with the separate VNet design rule. An individual Azure VNet can contain a maximum of one delegated subnet for Oracle AI Database@Azure, but an organization can have several VNets and therefore several delegated subnets across the same region up to the default service limit.

Oracle identifies the relevant service-limit metadata as:

Service: Multicloud

Resource: Delegated Subnet Multicloud Links

Limit name: azure-delegated-subnet-count

The limit operates at regional scope. Therefore, creating additional peerings or Route Servers does not bypass it; the correct approach is to request additional service capacity through Oracle's service-limit process.

Values of 1, 3, and 10 do not represent the default regional limit.

Therefore, A. 5 is correct.

Study Guide reference: Configure Oracle AI Database@Azure Networking — delegated subnet quotas and service-limit increases.

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