Which of the following is not included in the STEP approach?
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Explanation: The WHO STEPwise approach (STEPS) is a standardized framework for countries to collect, analyze, and disseminate data on key risk factors for non-communicable diseases (NCDs) . It is designed to be simple and flexible, gathering information in three sequential "steps." Step 1: Questionnaire-based assessment of demographic, behavioral, and historical risk factors (e.g., tobacco use, alcohol consumption, diet, physical activity). Step 2: Simple physical measurements (e.g., height, weight, waist circumference, blood pressure ). (Option B ruled out) Step 3: Biochemical measurements (e.g., fasting blood sugar , blood lipids like cholesterol). (Options C & D ruled out) Blood group is a fixed genetic characteristic and is not considered a modifiable risk factor for NCDs in the context of this surveillance tool. Therefore, it is not included in the STEPS approach.