The correct answer is C. Radiobiology.
Radiobiology is the study of the effects of ionizing radiation on living organisms. It is a multidisciplinary field that draws on physics, chemistry, biology, and medicine. Radiobiology has applications in a wide range of fields, including medicine, agriculture, and environmental science.
Pathology is the study of disease. It is a branch of medicine that deals with the causes, diagnosis, and treatment of disease. Pathology is a very broad field, and it encompasses a wide range of subspecialties.
Etiology is the study of the causes of disease. It is a branch of medicine that deals with the factors that contribute to the development of disease. Etiology is a very important field of study, as it can help us to prevent and treat disease.
Cosmology is the study of the origin, evolution, and ultimate fate of the universe. It is a branch of astronomy that deals with the largest scales in the universe. Cosmology is a very complex field, and it is still an active area of research.
In conclusion, the correct answer to the question “Study of effect of radiation on plant and animal is” is C. Radiobiology.