Which of the following statements is correct?

(1) Parthenium is an endemic species of our country.

(2) African catfish is not a threat to indigenous catfishes.

(3) Steller's sea cow is an extinct animal.

(4) Lantana is popularly known as carrot grass.

Ans. (c) Stellar's sea cow (from Russia) is a recently extinct animal. Parthenium (carrot grass) is an exotic weed, which grows rapidly and adversely affects the native species.

African catfish is also an alien species which adversely affects the growth of indigenous Clarias batrachus our local species

Lantana Camara, another alien species, is also strongly competing with native species.