Ecological diversity in India is more diverse than Norway. → Correct, India has varied ecosystems (Himalayas, deserts, coasts, rainforests) compared to Norway’s limited range.

In India, about 5000 varieties of mangoes are found. → This is incorrect. India has a huge diversity of mangoes, but the actual number is closer to 1000 varieties, not 5000.

Among vertebrates, more than half of the species belong to fishes. → Correct, fishes are the largest vertebrate group globally.

India is one of the 17 mega diversity countries of the world. → Correct, India is officially recognized among the 17 mega-diverse nations.

──────────────────────────────────────────────────────────────────────────────────────────