Choose the word which is different from the rest.

The answer is D. Archaeology.

Pathology is the study of disease, including the causes, diagnosis, and treatment of disease. Histology is the study of the microscopic structure of tissues. Haematology is the study of blood and blood disorders. Archaeology is the study of human history through the excavation of material remains.

Pathology, histology, and haematology are all medical sciences, while archaeology is a humanities discipline.