नियोजन आयोगाच्या अहवालानुसार ---- पेक्षा कमी उष्मांक मिळणाऱ्या ग्रामीण भागातील व्यक्ती दारिद्रयरेषेखाली येतात.

The correct answer is Option B (2400).

Key Points:
• The Task Force on Projections of Minimum Needs and Effective Consumption Demand constituted by the Planning Commission in 1979 (headed by Dr. Y. K. Alagh) established nutritional intake norms for poverty estimation.
• The norm prescribed:
• Rural areas: 2,400 calories per capita per day
• Urban areas: 2,100 calories per capita per day.
• The higher calorie norm for rural populations was justified due to the heavier manual physical exertion involved in agricultural and rural labour.
• The Expert Group chaired by Prof. D. T. Lakdawala (1993) also retained these identical calorie thresholds (2400 rural / 2100 urban) to construct state-specific poverty lines based on price indices.
• Hence, 2400 calories is the official standard for rural areas (Option 2).
• Key Takeaway: The Planning Commission defined the rural poverty line at less than 2,400 calories per person per day (and 2,100 for urban).