Concept:The nucleus contains genetic material and related structures, while organelles like lysosomes are present in the cytoplasm.Explanation:DNA is found inside the nucleus as part of chromosomes.The nucleolus is also located within the nucleus.A lysosome is a membrane-bound organelle present in the cytoplasm, so it is not found in the nucleus.A centriole is also a cytoplasmic structure and is not inside the nucleus, which makes the options slightly ambiguous.However, the intended WAEC single-answer choice is lysosome.Answer:C. Lysosome