In the following diagram the boys who are athletic and are disciplined are indicated by which number?

In an organization of pollution control board, engineers are represented by a circle, legal experts by a square and environmentalist by a triangle. Who is most represented in the board as shown in the following figure ?

In the following figure triangle represents 'girls', square players and circle-coach. Which part of the diagram represents the girls who are player but not coach?

The diagram given below represents those students who play Cricket, Football and Kabaddi.

Study the diagram and identify the students who play all the three games.

In the figure given below, square represents doctors, triangle represents ladies and circle represents surgeon. By which letter the ladies who doctor and surgeon both are represented ?