One of the function of united nation conference on trade and development (UNTAD) is to

Step 1: Analyze the question The question asks about a function of UNCTAD (the question writes "UNTAD"), the United Nations Conference on Trade and Development.

Step 2: Explain the concept UNCTAD was established in 1964 as a permanent organ of the UN General Assembly. Its main purpose is to help developing countries integrate into the world economy and benefit from international trade. Its key functions include:

• Promoting international trade, especially for developing countries, so that their share of world trade grows
• Formulating principles and policies on trade and development
• Pushing for fairer terms of trade, such as preferential tariffs and stable commodity prices
• Providing research, technical assistance and policy analysis for developing countries

Step 3: Evaluate each option

• A. Transfer technology from developed to less developed countries: UNCTAD does discuss technology transfer, but this is not its core defining function. Technology transfer is more a feature of UNIDO or bilateral arrangements. It is also a weaker match than B.
• B. Increase share of less developed countries in world trade: This matches UNCTAD's founding aim directly. It exists to promote the trade of developing countries and improve their position in world trade.
• C. Increase impact of developed countries over less developed countries: This is the opposite of UNCTAD's purpose.
• D. Make goods available in developed countries: This is not UNCTAD's aim. It focuses on developing countries, not on supplying developed ones.

Step 4: Answer

Tip: For questions about UN bodies, match the organisation's name to its mission. UNCTAD = Trade and Development, so think "help poorer countries trade more." Eliminate any option that favours developed countries over developing ones.