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The question is about the average size of households in different states in India as per the 1991 Census and in descending order. The correct answer is Option 2.
Option 1: Haryana, Uttar Pradesh, Kerala, Tamil Nadu: This option does not accurately represent the order of states in terms of the number of persons per household.
Option 2: Uttar Pradesh, West Bengal, Gujarat, Kerala: This option is correct. As of the 1991 census, Uttar Pradesh had the highest average number of persons per household, followed by West Bengal, Gujarat, and then Kerala.
Option 3: Gujarat, Haryana, Uttar Pradesh, West Bengal: This option does not follow the correct sequence as Uttar Pradesh had a higher average number of persons per household than Gujarat and Haryana.
Option 4: Uttar Pradesh, West Bengal, Tamil Nadu, Kerala: This option is incorrect because Gujarat, not Tamil Nadu, maintains a higher average number of persons per household as per the 1991 Census.