Which one of the following is omnivorous?
Correct option is D. Man
Frog is a carnivore as it feeds on insects or other small invertebrates.
Lion is a carnivore as well as they consume meat of other animals.
Deer is herbivore as it eat leaves from trees, bushes and shrubs.
Man is an omnivore animal as it eats both plants and animals. Hence option D is correct.