Social & Preventive Medicine If we do another study for 10-20 years in forward direction after retrospective coho study, it now is known as:- A Mixed Coho study B Retrospective coho study C Nested case control study D Mixed case control study 💡 Explanation If we do another study for 10-20 years in forward direction after retrospective coho study, it now is known as:- ✓ Correct Answer: A. Mixed Coho study