With reference to the sectors of the Indian economy, consider the following pairs :

Economic activity	Sector
1. Storage of agricultural produce	Secondary
2. Dairy farm	Primary
3. Mineral exploration	Tertiary
4. Weaving cloth	Secondary

How many of the pairs given above are correctly matched?

The correct option is Only two.

To understand why only two pairs are correctly matched, let us analyze the three main sectors of the Indian economy and evaluate each pair step-by-step:

1. Storage of agricultural produce (Matched with Secondary Sector in the question)
• Primary Sector: Involves activities that directly exploit natural resources (e.g., agriculture, forestry, fishing).
• Secondary Sector: Involves manufacturing and processing where raw materials are converted into finished goods.
• Tertiary Sector: Involves providing services that aid and support the primary and secondary sectors, such as transport, banking, communication, and storage.
Since "Storage of agricultural produce" is a service that helps support the distribution and preservation of goods, it belongs to the Tertiary Sector, not the Secondary Sector. Therefore, Pair 1 is incorrectly matched.

2. Dairy farm (Matched with Primary Sector in the question)
• Dairy farming involves rearing animals for milk, which is a direct biological process using natural resources (livestock and fodder).
• Because it directly exploits natural biological processes and resources, dairy farming falls under the Primary Sector.
Therefore, Pair 2 is correctly matched.

3. Mineral exploration (Matched with Tertiary Sector in the question)
• Exploration and extraction of minerals (mining) involve directly extracting natural resources from the earth.
• As it deals with the direct extraction of raw materials from nature, mineral exploration and mining are classified under the Primary Sector.
Therefore, Pair 3 is incorrectly matched.

4. Weaving cloth (Matched with Secondary Sector in the question)
• Weaving cloth involves taking a raw material (like cotton fiber, which is a primary product) and manufacturing it into a textile (cloth).
• Since this process adds value to raw materials through manufacturing and industrial activity, it belongs to the Secondary Sector.
Therefore, Pair 4 is correctly matched.

Conclusion:
Out of the four pairs given:
• Pair 2 (Dairy farm - Primary) is correctly matched.
• Pair 4 (Weaving cloth - Secondary) is correctly matched.
• Pairs 1 and 3 are incorrectly matched.
Thus, exactly only two pairs are correctly matched.