A free trade area (a-2) eliminates internal duties. A customs union (b-3) adds a common external tariff. A common market (c-1) allows free movement of factors of production. An economic union (d-4) represents the most advanced stage of integration, involving harmonized economic policies. This matching reflects the standard progression of economic cooperation between nations.

The International Monetary Fund (IMF) operates on a financial year that concludes on April 30th. Regarding membership, the figure of 197 members as of June 2011 is factually incorrect, as the IMF had 187 members at that time. Therefore, statement A is correct while statement B is inaccurate, making A the only valid choice.

The establishment years are: World Bank (1946), International Finance Corporation (1956), International Development Association (1960), and Asian Development Bank (1966). These institutions play critical roles in global economic development, providing financial assistance, policy advice, and technical support to member countries to promote economic growth and reduce poverty on a global scale.

TRIPS (Trade-Related Aspects of Intellectual Property Rights) and TRIMS (Trade-Related Investment Measures) are core agreements under the WTO. The Ministerial Conference is the highest decision-making body of the WTO. TRAI stands for the Telecom Regulatory Authority of India, which is a national regulatory body and has no connection to the international trade framework of the WTO.

The impact of WTO on developing economies is often debated. While the provided answer suggests population, child labor, and unemployment are key impacts, this is a subjective assessment often found in specific academic contexts. We preserve the answer as provided in the source material.

The WTO was established as a result of the Uruguay Round of negotiations, which took place from 1986 to 1994. This round was the largest trade negotiation ever, leading to the Marrakesh Agreement, which replaced the General Agreement on Tariffs and Trade (GATT) with the WTO.

The IMF's primary objectives include fostering global monetary cooperation, securing financial stability, facilitating international trade, promoting high employment and sustainable economic growth, and reducing poverty. While exchange rate stability is a core function of the IMF, the question implies a selection based on specific institutional mandates. Note: Some sources argue all listed options are related to IMF goals, creating potential ambiguity regarding the 'correct' answer.

The World Bank, particularly through the International Development Association (IDA), provides concessional loans and grants to the world's poorest developing countries. These credits often have long repayment periods, typically spanning up to 40 years, including a grace period, to assist countries in long-term development projects.

The Bretton Woods Conference, officially known as the United Nations Monetary and Financial Conference, was held in 1944 to establish a new international financial order. The two major institutions created were the International Monetary Fund (IMF) to ensure monetary stability and the International Bank for Reconstruction and Development (IBRD), which is the primary institution of the World Bank Group, to facilitate post-war reconstruction.

The World Trade Organization (WTO) operates on the principle of multilateralism. Its agreements and trade rules are negotiated and signed by the bulk of the world's trading nations and ratified in their parliaments, ensuring that the commitments made are binding and applicable to all member countries to facilitate fair and open international trade.