Q.3 Which of the following is not an invasive alien species in the Indian
context?

(1) Lantana
(2) Cynodon
(3) Parthenium
(4) Eichhornia
Ans. (b) Cynodon (doob grass) is not an invasive alien species. The other three Parthenium (congress or carrot grass), Eichhornia (water hyacinth), and Lantana are alien species that pose threat to native species.
Page 265, XII NCERT