OCI images, Docker images, OCI artifacts and Helm charts is correct.

The Contoso Container Registry accepts modern container and artifact formats so it can store OCI images and Docker images which are compatible because Docker images implement the OCI image specification. It also supports OCI artifacts which cover a broader set of artifact types and it can host Helm charts for Kubernetes application packaging.

Docker images only is incorrect because the registry supports additional formats beyond just Docker images and the correct option includes OCI artifacts and Helm charts as well.

ISO disk images and ZIP archives is incorrect because those are general archive or disk image formats and they are not container image or artifact formats that a container registry is designed to store and serve.

Docker images and Google Container Registry artifacts is incorrect because Google Container Registry refers to a service rather than a container image format and the option does not mention OCI artifacts or Helm charts which the Contoso registry does support. Note that Google Cloud is moving users toward Artifact Registry which is why answers naming older services are less likely on newer exams.

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