India's poverty line was originally fixed using a minimum calorie intake norm, and this norm is different for rural and urban areas because of different activity levels.
The rural figure of 2400 kcal per person per day and the urban figure of 2100 kcal per person per day come from the same Planning Commission and Task Force calculations, with the lower urban figure reflecting the assumption of less physically demanding work in cities.
Let's summarize:
So the correct answer is 2100 calories.