Explanation –

• Tertiary Sector – Utilities (electricity & water supply):This pair is not correctly matched. Utilities such as electricity and water supply are considered part of the secondary sector because they involve industrial processes and infrastructure similar to manufacturing.
• Secondary Sector – Construction:This pair is correctly matched. The secondary sector includes activities related to manufacturing and construction, where raw materials are transformed into finished goods or infrastructure.
• Tertiary Sector – Trade:This pair is correctly matched. The tertiary sector encompasses services, including trade, which involves the distribution and sale of goods and services.

Source: The Hindu