Correct Answer - Option 1 : Craniology : shells
1) Craniology : shells →
Conchology is the study of mollusk shells.
While the scientific study of the shape and size of the skulls of different human races.
2) Virology : viruses →
Virology is the scientific discipline concerned with the study of the biology of viruses and viral diseases, including the distribution, biochemistry, physiology, molecular biology, ecology, evolution, and clinical aspects of viruses.
3) Physiology : body →
Physiology is the science of life. It is the branch of biology that aims to understand the mechanisms of living things, from the basis of cell function at the ionic and molecular level to the integrated behavior of the whole body and the influence of the external environment.
4) Zoology : animals →
Zoology (also known as animal science) is the branch of biology devoted to the study of animal life. It covers areas ranging from the structure of organisms to the subcellular unit of life.
Hence, "Craniology : shells" is the correct answer.