Which of the statement are in accordance with the observation of geographer Alexander von Humboldt ?
I. Within a region species, richness increases with increasing explored area but within a limit.
II. The relation between species richness and area is a rectangular hyperbole.
III. The richness of species decreases with the increasing explored area.
IV. There is no relation between the explored area and species richness .

Options

A. I and II only
B. I , III and IV
C. II and IV
D. II and III

Answer

A