What is BMI?

• A. A ratio of height to weight
• B. A measure of fat percentage only
• C. A ratio of weight to height
• D. A measure of bone density

Answer: (C)

BMI measures body mass relative to height to give a rough sense of body composition. It is calculated as weight divided by height squared (BMI = weight / height^2). This means taller people with the same weight tend to have a lower BMI, and BMI does not measure fat percentage directly or bone density. Among the options, the closest description is a ratio involving weight and height, though the precise calculation uses height squared in the denominator.