The exotic species, who introduced in India are:
(a) Lantana (b) Water Hyacinth (Eicchornia)
(c) Parthenium (d) All are correct
The exotic species introduced in India which caused the environmental damage and posed threat to native species are weed species like carrot grass (Parthenium), Lantana and water hyacinth (Eicchornia). The recent illegal introduction of the African catfish Clarias gariepinus for aquaculture purposes is posing a threat to the indigenous catfishes in our rivers.