Social & Preventive Medicine In STD cases, a patient is asked to name other persons is his socio sexual group, then they are investigated. This is a example of – A Screening B Contact tracing C Mass screening D High risk screening 💡 Explanation In STD cases, a patient is asked to name other persons is his socio sexual group, then they are investigated. This is a example of - ✓ Correct Answer: B. Contact tracing