Which of the following is not a major geographic quality of South Asia?

a. India is located in the heart of one of the world's largest population clusters.

b. South Asia is marked by strong linguistic homogeneity.

c. The Ganges-Brahmaputra and Indus river systems support hundreds of millions of people.

d. Agriculture in South Asia is generally not as productive as in other parts of Asia.

e. India constitutes the world's largest and most complex federal state.

e.????

b. South Asia is marked by strong linguistic homogeneity

is false. There are lots of languages in South Asia.