Which of the following is an example of social history?

An example of social history is occupation. Social history encompasses various aspects of a patient’s lifestyle and background that can affect their health, and one significant factor is the patient's occupation. Understanding what a patient does for a living provides insights into potential environmental exposures, stress levels, and social determinants of health that may impact their overall well-being. For instance, certain occupations may subject individuals to physical strain or hazardous materials, while others may carry a different set of health influences based on factors such as work hours or the nature of job-related stress.

The other options focus more on specific medical information: blood type pertains to biological and genetic data; medication history details pharmaceutical interventions a patient has undergone; and allergy information includes reactions to substances that could affect treatment plans. These are crucial for clinical assessment but are more aligned with medical history rather than social history, which looks at broader lifestyle patterns.