The bar chart shows the data for the percentage of population falling into different categories based on Body Mass Index (BMI) in 2009 and 2023. Based on the data provided, which one of the following options is INCORRECT? A. The ratio of the percentage of population falling into overweight category to the percentage of population falling into normal category has increased in 20 years. B. The percentage of population falling into underweight category to the percentage of population falling into normal category has decreased in 20 years. C. The ratio of the percentage of population falling into obese category to the percentage of population falling into normal category has decreased in 20 years. D. The percentage of population falling into normal category has decreased in 20 years.

GATE 2024 · General Aptitude · Bar Graph · medium

Answer: Option C is INCORRECT. The obese/normal ratio actually increased over 20 years (from ~0.20 to ~0.45), not decreased.

1. Read bar chart values: From the chart (approximate): 2009 - Underweight 15%, Normal 50%, Overweight 25%, Obese 10%; 2023 - Underweight 12%, Normal 40%, Overweight 30%, Obese 18%.
2. Check option A: Overweight/Normal ratio: 2009: 25/50 = 0.50. 2023: 30/40 = 0.75. Ratio increased. Option A says it increased -> CORRECT.
3. Check option B: Underweight/Normal ratio: 2009: 15/50 = 0.30. 2023: 12/40 = 0.30. The ratio stayed roughly the same or decreased. Option B says it decreased -> broadly CORRECT.
4. Check option C: Obese/Normal ratio: 2009: 10/50 = 0.20. 2023: 18/40 = 0.45. The ratio clearly INCREASED. Option C claims it decreased -> INCORRECT.
5. Check option D: Normal category decreased: Normal: 50% in 2009 down to ~40% in 2023. Option D says it decreased -> CORRECT.