The client.delete_registered_model method of the MlflowClient class can be used to delete a model from the MLflow Model Registry. The method takes the following parameter:

name: The name of the registered model to delete.

The method deletes the registered model and all its versions from the Model Registry. The method does not return any value1

The other options are incorrect because:

A. The client.transition_model_version_stage method can be used to transition a model version to a different stage, such as None, Staging, Production, or Archived. The method does not delete the model or the model version from the Model Registry2

B. The client.delete_model_version method can be used to delete a specific model version from the Model Registry. The method does not delete the registered model or all its versions from the Model Registry3

C. The client.update_registered_model method can be used to update the metadata of a registered model, such as its name or description. The method does not delete the model or its versions from the Model Registry4

D. There is no method called client.delete_model. To delete a model from the Model Registry, the client.delete_registered_model method should be used.

References:

mlflow.tracking.client.MlflowClient.delete_registered_model — MLflow 2.9.1 documentation

mlflow.tracking.client.MlflowClient.transition_model_version_stage — MLflow 2.9.1 documentation

mlflow.tracking.client.MlflowClient.delete_model_version — MLflow 2.9.1 documentation

mlflow.tracking.client.MlflowClient.update_registered_model — MLflow 2.9.1 documentation