In the Venn diagram shown here, the triangle represents ‘students’, the circle represents ‘diploma holders’ and the quadrilateral represent

In the Venn diagram shown here, the triangle represents ‘students’, the circle represents ‘diploma holders’ and the quadrilateral represent ‘graduates’. The numbers given in the diagram represents number of persons of that particular category.

How many students are diploma holders but NOT graduates?

a)            8

b)            11

c)            40

d)            30