The question given below contains three elements. These elements may or may…

Concept: In these three-class Venn-diagram classification questions, the diagram you pick must mirror the real-world membership relation among the three items: full containment (nested circles) means one class is entirely a subset of the next; partial overlap means the classes share some but not all members; and fully separate circles mean the classes have absolutely no members in common.

Application: Iron and Lead are both distinct, standalone chemical elements (metals), and Nitrogen is a separate, distinct chemical element (a non-metal). None of Iron, Lead, or Nitrogen is a sub-category of any other — an element cannot be a kind of another element, nor can it partially share members with another element, since each element is its own single class. So there is no subset, overlap, or partial-link relation between any pair of these three.

Cross-check: Testing each diagram type against this: nested circles (full containment) would require one to be a broader class the others fall under — not true here. A chain of pairwise overlaps would require some shared property between adjacent items but not the third — not true here either, since none of the three shares members with any other. Only the diagram with three fully separate circles has zero shared members between every pair, which matches Iron, Lead, and Nitrogen being three completely independent, mutually exclusive elements.

Result: The diagram with three separate, non-intersecting circles is the correct representation of the relationship between Iron, Lead and Nitrogen.