Going with C, here's why. https://kubernetes.io/docs/concepts/workloads/controllers/deployment/ A. kubectl get deployment nginx-deployment - No, this won't list the images in use. B. kubectl get pod nginx - No (that's not even the name of the thing) C. kubectl describe deployment nginx-deployment - Yes, this lists all the images in use (see the link) D. docker ps - Wow, this would just list all running docker processes... not even the images in use, just the current containers. And not even the context of the deployment. Wrong wrong wrong.