The correct answer is A. Lowest.
The average size of landholdings in Bihar is 0.43 hectares, which is the lowest among all Indian states. This means that the average farmer in Bihar owns a very small piece of land, which is not enough to support a family. This is one of the reasons why poverty is so widespread in Bihar.
The other options are incorrect. Option B is incorrect because the second lowest average size of landholdings is in Uttar Pradesh, which is 0.52 hectares. Option C is incorrect because the highest average size of landholdings is in Punjab, which is 2.2 hectares. Option D is incorrect because the second highest average size of landholdings is in Haryana, which is 1.9 hectares. Option E is incorrect because the average size of landholdings in Bihar is the lowest among all Indian states.