The correct option is
D None of the above
Sea lions are aquatic mammals. They range from subarctic to subtropical waters of the Northern and the Southern hemispheres. They usually weigh hundreds of kilograms and are considered heavy feeders.
Seals are also marine animals but vary from sea lions in their physical appearance. The most distinct of them being the absence of visible ear flaps. Walrus and otters are also two animals very different from sea lions.
So, the correct answer is 'None of the above'.