The correct answer is 1, 2 and 3 only. Explanation & Key Takeaways: Sectors of Economy: • Economic activities result in the production of goods and services while sectors are the group of economic activities classified on the basis of some criteria. • The Indian economy can be classified into various sectors on the basis of ownership, working conditions and the nature of the activities. Primary Sector: • In the Primary sector of the economy, activities are undertaken by directly using natural resources. • Agriculture, Mining and quarrying, Fishing, Forestry, Dairy, etc. are some examples of this sector. Hence, statement 4 is not correct. • It is called so because it forms the base for all other products. Since most of the natural products we get are from agriculture, dairy, forestry, and fishing, it is also called Agriculture and allied sector. • People engaged in primary activities are called red-collar workers due to the outdoor nature of their work. Secondary Sector: • It includes the industries where finished products are made from natural materials produced in the primary sector. • Industrial production, cotton fabric, sugar production, Construction, etc. activities come under this sector. Hence, statements 1, 2 and 3 are correct. • Hence its the part of a country's economy that manufactures goods, rather than producing raw materials • Since this sector is associated with different kinds of industries, it is also called the industrial sector. • People engaged in secondary activities are called blue-collar workers. Tertiary Sector/Service Sector: • This sector’s activities help in the development of the primary and secondary sectors. • By itself, economic activities in the tertiary sector do not produce goods but they are an aid or support for the production. • Goods transported by trucks or trains, banking, insurance, finance etc. come under the sector. It provides the value added to a product same as the secondary sector. • These sector jobs are called white-collar jobs.