Read the sentences. Walruses have two long, pointed teeth called tusks. Elephants have two long pointed teeth called tusks.

Which is the best way to combine the sentences above using signal words or phrases?

Walruses, as well as elephants, have two long, pointed teeth called tusks.
Walruses have two long, pointed teeth called tusks and elephants.
Walruses, in contrast to elephants, have two long, pointed teeth called tusks.
Walruses have two more long, pointed teeth called tusks than elephants.