This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
The study of human behaviour is defined as: 
Select and explain. 
A. Psychology, B. Psychiatry, C. Anthropology, D. None of the above
A: Psychology
Answer: A: Psychology 
Explanation: Psychology is defined as the study of human behaviour of how people behave and why they behave in the way they do. Ref: Park 21st edition page: 623.