High Glycemic Index foods are those which have a Glycemic Index of:

Question

Accepted Answer

The correct option is 1:

The Glycemic Index (GI) is a scientific system used to rank carbohydrate-containing foods based on how quickly and how high they raise blood sugar levels after eating. This system, standardised by major health bodies like the World Health Organization (WHO) and the Food and Agriculture Organization (FAO), uses three distinct numerical categories. High Glycemic Index (High GI) foods are fundamentally those that cause a rapid and significant spike in blood glucose levels, and this category is generally defined as any food with a GI value of **70 or greater**. The number 70 is the internationally recognised and most critical threshold that separates the medium and high GI categories. In the context of this question, Option 1 is selected because it identifies the numerical value 70 as the boundary point associated with the High GI category, distinguishing it as the range where foods begin to have the highest impact on blood sugar. Therefore, the High GI classification starts at this benchmark value.

The incorrect option is 2:

The range of **55-70** in the Glycemic Index system is primarily associated with the **Medium Glycemic Index** category. The actual Medium GI classification typically spans from a GI of 56 up to 69, indicating foods that cause a moderate rise in blood glucose levels. These foods are digested and absorbed at an intermediate rate—slower than high GI foods, but faster than low GI foods. Examples include certain varieties of rice and bread. Therefore, this option represents an intermediate category in the GI system and does not correctly identify the highest impact foods that the question is specifically asking for. Students must be precise with their numerical cutoffs to accurately distinguish between the moderate and high GI food groups.

The incorrect option is 3:

A Glycemic Index of **\< 55** is the universally accepted criterion for classifying **Low Glycemic Index** (Low GI) foods. Foods in this category, such as most legumes, non-starchy vegetables, and many whole grains, are digested and absorbed very slowly. This slow process leads to a minimal and gradual rise in blood sugar and insulin levels, which is highly beneficial for maintaining stable energy levels and managing metabolic health. Since the upper limit of 55 marks the precise boundary for the entire Low GI category, this option describes the least impactful foods on blood sugar. Consequently, it is the classification that is lowest and farthest from the *High* GI designation being sought in the question.

The incorrect option is 4:

The statement that "All options are wrong" is conceptually incorrect because the Glycemic Index system is a well-established, scientifically validated, and highly structured nutritional framework. Standardised classification ranges for low, medium, and high GI foods exist and are widely used for dietary guidance globally. The WHO/FAO classification provides a definitive and recognised set of numerical cutoffs. Since a universally accepted framework is in place, and the other options reference the key numerical values used in that framework, the rejection of the entire concept by claiming all options are wrong is factually unsound in principle. The question is based on a real, accepted nutritional science standard.