(B) Classification + Localization
Classification + Localization involves identifying what object is present and its location, and is used only for single objects.
Source: Chapter 5, Section 5.2 Computer Vision Tasks
The passage explicitly states: "It is used only for single objects" for Classification + Localization. Object Detection handles multiple objects, and Instance Segmentation deals with pixel-level labeling of multiple instances. "Non-Localization" is not a real CV task. Examiners expect the correct option with a brief justification from the text.