The correct answer is A. Biology.
Pathology, cardiology, radiology, and ophthalmology are all branches of medicine. Medicine is a branch of biology that deals with the prevention, diagnosis, and treatment of disease.
Biology is the scientific study of life. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all organisms are made up of cells that process hereditary information encoded in genes, which can be transmitted to future generations. Another major theme is evolution, which explains the unity and diversity of life. Energy processing is also important to life as it provides the chemical energy to drive the biological processes that support life.
Hematology is the study of blood, the blood-forming organs, and blood diseases.
Zoology is the scientific study of animals. It is a branch of biology that deals with the classification, identification, distribution, and behavior of animals.
Geology is the scientific study of the Earth, its history, and its processes. It is a natural science with a broad scope but has several unifying themes that tie it together as a single, coherent field. For instance, all aspects of geology are interrelated, and together they constitute the science of the Earth.
In conclusion, the correct answer is A. Biology.
