Vestigial pelvic girdle and bone remnants of hind limbs are characteristic of
In spite of the fact that whales need outside rear legs (with the exception of as uncommon teratologies), they do have inward fundamentals of the rear appendages and pelvic support, as I was reminded amid an ongoing visit to my and Jerry's Institute of matriculation, the Museum of Comparative
So, the correct option is 'Whale'.