A similarity among blackbuck, gharial, rhinoceros and marsh crocodile is that they are
Endangered species
The correct option is C.
Explanation of correct option:
Explanation of incorrect option:
Option A:
The animals blackbuck, gharial, rhinoceros, and marsh crocodile do not contain thick chitinous skin.
Option B:
The female that produces an egg is called oviparous so all animals like blackbuck, gharial, rhinoceros and marsh crocodile are not oviparous.
Option D:
In blackbuck, gharial, rhinoceros, and marsh crocodile, all animals are not found in the forest some animals habitats are water.
Final answer: A similarity among blackbuck, gharial, rhinoceros and marsh crocodile is that they are endangered species.