Correct Answer: (a) Agriculture sector
Solution:Often more people are engaged in agriculture than are required to achieve the optimum level of production in agriculture. These are people who, if they are excluded from the agricultural sector, there will be no reduction in the total production obtained from agriculture. Seeing this, they are engaged in labour but are not actually employed, because the marginal productivity of their labour is zero. Therefore, such labour is called disguised or hidden unemployment. This is the most severe and bizarre problem in the Indian agriculture sector.