The correct answer is option 'B' which states that the minimum daily intake of calories for determining the poverty line in rural areas is 2400.

Explanation:
1. Determining the poverty line: The poverty line is a method used to determine the minimum level of income or consumption required to meet basic needs and lead a decent life. In India, the Planning Commission was responsible for estimating the poverty line and determining the minimum daily intake of calories required for this purpose.

2. Minimum daily intake of calories: The minimum daily intake of calories is an important factor in determining the poverty line as it reflects the nutritional requirements for individuals to maintain their health and well-being. It is measured in terms of kilocalories (kcal) and varies based on age, gender, and activity level.

3. Poverty line for rural areas: The Planning Commission set different poverty lines for rural and urban areas, taking into account the specific needs and living conditions of each. For rural areas, the minimum daily intake of calories required to determine the poverty line was set at 2400 kcal.

4. Importance of calorie intake in poverty estimation: Calorie intake is used as a proxy for measuring the adequacy of food consumption and nutritional well-being. By setting a minimum calorie intake threshold, the Planning Commission aimed to capture the basic food requirements necessary to meet dietary needs and prevent malnutrition.

5. Other factors considered: While the minimum daily intake of calories is an important criterion in determining the poverty line, it is not the sole factor. The Planning Commission also considered other parameters such as the cost of essential non-food items, education, health, and other basic needs while estimating poverty levels.

In conclusion, the Planning Commission determined that the minimum daily intake of calories required to establish the poverty line in rural areas is 2400 kcal. This value is crucial in assessing the nutritional well-being and basic food requirements of individuals living below the poverty line.

2400 for rural areas and 2100 for urban...