Match List-I with List-II:

List-I (Economic Activity)	List-II (Example)
(A) Quaternary	(I) Manufacturing
(B) Secondary	(II) Mining
(C) Tertiary	(III) Taxi services
(D) Primary	(IV) Research scientist

Choose the correct answer from the options given below:

The correct option is (A)– (IV), (B)– (I), (C)– (III), (D)– (II).

To understand why this is the correct matching, let us analyze the different sectors of economic activities and match them step-by-step with the examples provided in the table:

1. Primary Activities (D):
Primary activities are those that are directly dependent on the environment, as these refer to the utilization of Earth's resources such as land, water, vegetation, building materials, and minerals. Examples include agriculture, forestry, fishing, hunting, and mining. Therefore, (D) Primary matches with (II) Mining.

2. Secondary Activities (B):
Secondary activities add value to natural resources by transforming raw materials into valuable products. These activities are concerned with manufacturing, processing, and construction. Therefore, (B) Secondary matches with (I) Manufacturing.

3. Tertiary Activities (C):
Tertiary activities involve the provision of services rather than production of tangible goods. These include trade, transport, communication, and other commercial services. Taxi services are a form of transport service. Therefore, (C) Tertiary matches with (III) Taxi services.

4. Quaternary Activities (A):
Quaternary activities represent a highly specialized and advanced category of services, which are focused on knowledge, information processing, research, and development. A research scientist works in this knowledge-based sector. Therefore, (A) Quaternary matches with (IV) Research scientist.

Combining these correct matches gives:
(A) – (IV), (B) – (I), (C) – (III), (D) – (II)