Questions: The largest reptiles include which of the following? The Nile crocodile, the worm-lizard, and the elephant. The python, the sea turtle, and the American alligator. The Chinese alligator, the gecko, and the saltwater crocodile. The leatherback turtle, the Komodo dragon, and the wildebeast.

The answer is the second one: the python, the sea turtle, and the American alligator.

Explanation for each option:

1. The Nile crocodile, the worm-lizard, and the elephant.

   • The Nile crocodile is indeed one of the largest reptiles. However, the worm-lizard is not a large reptile, and the elephant is not a reptile at all; it is a mammal.

2. The python, the sea turtle, and the American alligator.

   • The python (specifically the reticulated python) is one of the largest snakes. The sea turtle (such as the leatherback sea turtle) is one of the largest turtles. The American alligator is also one of the largest reptiles. Therefore, this option correctly lists large reptiles.

3. The Chinese alligator, the gecko, and the saltwater crocodile.

   • The Chinese alligator is relatively small compared to other alligators and crocodiles. The gecko is a small lizard. The saltwater crocodile is indeed one of the largest reptiles, but the other two do not fit the category of largest reptiles.

4. The leatherback turtle, the Komodo dragon, and the wildebeest.

   • The leatherback turtle is one of the largest turtles, and the Komodo dragon is the largest living species of lizard. However, the wildebeest is not a reptile; it is a mammal.

In summary, the second option correctly lists large reptiles.