Key Concept: Carp species cultured in India are either native Indian carps or exotic species introduced from elsewhere.
Why it's correct: Hypophthalmichthys molitrix (Silver carp) is native to China and was introduced into India specifically for mixed carp culture alongside Indian Major Carps.
Why others fail: Catla catla, Labeo rohita, and Labeo calbasu are all Indian Major/Minor Carps, native to Indian waters — not exotic introductions.