Correct option is C
Statement I is correct because problem-based learning (PBL) is indeed a learner-centered approach that encourages students to learn by engaging with and solving real-world problems. It promotes active learning, critical thinking, and the application of knowledge.
Statement II is incorrect because guided discovery learning does involve teacher guidance. In guided discovery, the teacher provides scaffolding in the form of guided questions, directions, and prompts to help students construct their understanding. It contrasts with pure discovery learning, where students receive little to no guidance.