The question given below contains three elements. These elements may or may…
2025
The question given below contains three elements. These elements may or may not have some inter linkage. Each group of elements may fit into one of these diagrams at (A), (B), (C), (D) and/or (E). You have to indicate the group of elements which correctly fits into the diagrams. Which of the following diagrams indicates the best relation between Class, Blackboard and School ?
Attempted by 1 students.
Show answer & explanation
In classification (Venn diagram) reasoning questions, three items are linked by exactly one of three relationships: no relationship at all (drawn as separate circles), a partial overlap where the sets share only some members (drawn as intersecting circles), or a full part-of relationship where every member of one set is also a member of the other (drawn as one circle placed completely inside another). A chain of two successive full part-of relationships is drawn as three concentric circles, one nested completely inside the next.
Here, every blackboard is a fixture found inside a classroom, and every classroom is a room located inside a school — there is no blackboard outside a class and no class outside a school. That is two successive full part-of relationships (Blackboard fully inside Class, and Class fully inside School), so the diagram must show three concentric circles: the outermost circle for School, a circle drawn completely inside it for Class, and a circle drawn completely inside that one for Blackboard.
A diagram of three separate circles that never touch would mean blackboards, classes and schools never occur together at all — false, since a blackboard always exists within some class.
A diagram where two circles overlap each other and merely touch the edge of a third, larger circle leaves that larger circle standing apart instead of enclosing the other two — it does not show either item as fully part of the largest one.
A diagram of three circles overlapping only their immediate neighbour in a row would leave the two end circles with nothing in common, wrongly suggesting the smallest and the largest items are unconnected.
Only the diagram of three fully nested (concentric) circles keeps every blackboard inside a class and every class inside a school, with nothing existing outside that chain.
So the correct diagram is the one made of three concentric circles — one circle completely inside a second, which is itself completely inside a third.