What is a custom resource? 

Answer options:

A. Custom resources are new provisioned items that attach to a service.
B. Custom resources configure post-provisioning operations that users can perform on provisioned items.
C. Custom resources are a type of provisioned item mapped to an existing vRealize Orchestrator object type.
D. Custom resources configure the properties of blueprints using VMware vSphere endpoints.

B

Reference: https://pubs.vmware.com/vra-62/topic/com.vmware.ICbase/PDF/vrealize-automation-62-advanced-service-design.pdf (p.32)