Which of the following sectors of the economy registered the highest growth rate in the second quarter…

The correct choice is: Agriculture and Allied sectors

In the revised quarterly estimates released by the National Statistical Office in 2021 (first revised on 26 February 2021), real GVA growth in July–September 2020 was 3.0% for Agriculture, Forestry and Fishing, 2.3% for Electricity, Gas, Water Supply and Other Utility Services, −1.5% for Manufacturing and about −9% for Public Administration, Defence and Other Services (the official group that corresponds to “General Administration”). Agriculture was therefore the highest of the listed sectors.

The first estimate, released in November 2020, had shown utilities (4.4%) ahead of agriculture (3.4%), which is why the question refers to the revised estimates of 2021.