In an organization of pollution control board, engineers are represented by a…

Concept

In a Venn diagram, the ‘most represented’ group is simply the one occupying the largest area in the figure. In this style of question, an option naming a SINGLE category (such as ‘Environmentalists’ alone) refers only to the region belonging to that category alone — excluding any area it shares with another shape — while an option naming TWO categories together (such as ‘Environmentalists with Engineering background’) refers to the shared, overlapping region between those two shapes. Also, when one shape lies entirely inside another, every element of the inner shape automatically belongs to both categories, so that inner area becomes part of the overlap rather than a separate, exclusive region.

Application

1. Circle = Engineers, Square = Legal experts, Triangle = Environmentalists (as given in the question).

2. The triangle sits completely inside the circle — every vertex touches the circle’s boundary, but the triangle’s entire interior lies within the circular region.

3. Because the triangle is fully contained in the circle, the whole triangular area represents people who are both environmentalists AND engineers — there is no environmentalist who falls outside the circle.

4. The square only dips into a small corner of the circle (top-right); that thin overlap is the engineers-with-legal-background region, and it is visibly much smaller than the triangle. The square does not touch the triangle at all.

Cross-check

Comparing the two overlap regions confirms the triangle-circle intersection is by far the larger area, and since the triangle is wholly inside the circle, there is no separate ‘environmentalists only’ region left over to consider.

So the group combining environmentalists and engineers occupies the largest area and is the most represented group in the board.