As per the 1991 Census, the average size of households in terms of number of persons per household in respect of the given states follows the sequence (highest first, lowest last).

1. (a)Haryana, Uttar Pradesh, Kerala, Tamil Nadu
2. (b)Uttar Pradesh, West Bengal, Gujarat, Kerala
3. (c)Gujarat, Haryana, Uttar Pradesh, West Bengal
4. (d)Uttar Pradesh, West Bengal, Tamil Nadu, Kerala