The correct answer is (a) Agricultural sector.
Disguised unemployment is a type of unemployment in which people are employed in a job but are not producing anything. This can happen when there are too many people working in a particular sector of the economy, such as agriculture. In India, disguised unemployment is most common in the agricultural sector. This is because there are many people working in agriculture who are not actually needed. This can be due to a number of factors, such as the use of outdated farming methods or the fact that there is a lot of land that is not being used efficiently.
The other options are incorrect because they are not sectors of the economy in which disguised unemployment is found. The industrial sector is a sector of the economy that is involved in the production of goods. The service sector is a sector of the economy that is involved in providing services to consumers. The trade sector is a sector of the economy that is involved in the buying and selling of goods and services.