Based on your knowledge of chordate evolution, which of the following groups is MOST closely related to you (i. e., with whom have you most recently shared a common ancestor)?

a. Sea lamprey Coelacanth (a lobe-finned fish)
b. Gray treefrog (an amphibian)
c. Mudskipper (a ray-finned fish)
d. Burmese python (a snake)

The correct option is d) Burmese python (a snake)

Explanation:

Evolutionary study of chordates show that the earliest chordates were all marine animals. The evolution of marine chordates resulted in the formation of amphibians which were a transition state between marine animals and land animals. From the amphibians, reptiles and birds evolved. Studies show that reptiles and birds evolved into mammals such as the humans. Hence, as Burmese python is a reptile it will share a more common ancestor with humans.

the correct answer is b