The correct answer is B. Exobiology.
Exobiology is the study of the possibility of extraterrestrial life. It encompasses the search for life on other planets, moons, and other celestial bodies, as well as the study of the environmental conditions that could support life.
Endbiology is the study of life on Earth. It encompasses the study of all living organisms, including their structure, function, and evolution.
Neobiology is the study of new life forms. It encompasses the study of organisms that have recently been discovered or that have been genetically modified.
Enterbiology is not a real word.