Out of the four figures that follow,you are to indicate which figure will best represent the relationship amongst the three classes: Authors,Teachers,Men.

Select from the four alternative diagrams,the one that best illustrates the relationship among the three classes: pigeons,birds,dogs.

Choose the Venn diagram which best illustrates the three given classes: Protons,electrons,atoms.

Choose the Venn diagram which best illustrates the three given classes: Yak,Zebra,Bear.

In the given figure,the triangle represents girls,the square represents sports persons and the circle represents coaches. The portion in the figure which represents girls who are sports persons but not coaches is the one labelled.

In the given diagram,circle $A$ represents teachers who can teach Physics,circle $B$ represents teachers who can teach Chemistry,and circle $C$ represents those who can teach Mathematics. Among the regions marked $p, q, r, s, t, u, v$,the one which represents teachers who can teach Physics and Mathematics but not Chemistry is: