Answer: B

Explanation:

The 16th BRICS Agriculture Ministers' meeting in Indore unanimously adopted a joint declaration focusing on farmer-centric initiatives, establishing four major institutional initiatives.

BRICS Network of Centres of Excellence on Agro-Ecology and Regenerative Agriculture: Promotes organic and natural farming. The Indian Institute of Farming Systems Research (Modipuram) plays a key role in this.

Global Forum on Farmers’ Rights in Seed Systems: Protects farmers' seed rights, indigenous seed diversity, and traditional knowledge.

BRICS AgriN (Agro Inputs, Genetic Resources and Information Network): Strengthens technical cooperation and information sharing concerning seeds, genetic resources, and agricultural inputs.

Statement 4 is incorrect in this specific context. While land restoration is a vital global issue, the BRICS Land Restoration Partnership was previously launched (in 2025) and is not among the four new institutional initiatives officially announced at the Indore conference.

Answer: C

Explanation:

Statement 1 is incorrect. Type-specific antibodies provide strong protection against a particular serotype. However, cross-reactive antibodies can recognize multiple serotypes but do not always neutralize them.

Statement 2 is correct. In dengue infection, cross-reactive antibodies can bind to the virus. When these antibody levels decline, instead of neutralizing the virus, they may facilitate viral entry into immune cells, resulting in a severe dengue infection. This process is known as Antibody-Dependent Enhancement (ADE).

Statement 3 is correct. Because dengue exists in four distinct serotypes (DENV-1) to (DENV-4)), a tetravalent vaccine must safely induce balanced immunity against all four. The risk of triggering ADE is a primary safety challenge in developing live-attenuated vaccines, as observed during the rollout of similar vaccines in Brazil.

Answer: C

Explanation:

Statement 1 is correct: DengiAll is India's first indigenous tetravalent dengue vaccine candidate. It is being developed by Panacea Biotec Limited in a collaborative effort with the Indian Council of Medical Research (ICMR).

Statement 2 is incorrect: DengiAll is not an mRNA vaccine. Instead, it is a live-attenuated (weakened) viral vaccine.

Statement 3 is correct: Being a tetravalent vaccine, DengiAll is designed to provide protection and induce a robust immune response against all four dengue virus subtypes (serotypes DENV-1 to DENV-4).

Answer: c

Explanation:

Statement 1 is correct: To institutionalize and expand collaboration in Artificial Intelligence—making "trusted AI" a central pillar of their innovation partnership—both nations established the Joint India-France AI Working Group.

Statement 2 is correct: During the summit, the leaders launched a Dialogue on Economic Security. This is designed to strengthen cooperation regarding critical minerals, resilient supply chains, and emerging technologies.

Answer: A

Explanation:

Statement 1 is correct: The total number of items in the new WPI basket has been increased from 697 to 957.

Statement 2 is correct: To align with other major fuels (coal, electricity, and petroleum products), Crude Petroleum and Natural Gas have been shifted from the 'Primary Articles' group to the 'Fuel and Power' major group in the new series.

Statement 3 is incorrect: The new methodology for deriving weights uses the Gross Value of Output (GVO) rather than the "Net Traded Value" (GVO + Imports - Exports) which was used in the previous WPI 2011-12 series. Using GVO reflects domestic production more accurately and represents the economic significance of commodities much better.

Statement 4 is correct: Renewable energy sources (Solar and Wind) and Nuclear Electricity have been newly added under the ‘Electricity’ group to reflect the modern energy transition.