According to Austin, International law is not a law in its true sense. However, in the world economy at large this International law has become of paramount important a because it helps in the regulation of numerous relations among the countries/nations like trade relations, human rights, dispute resolving mechanism, financial assistance, etc. Numerous International organizations have been established, numerous treaties/conventions have been ratified to encourage and to protect International relations. In light of this passage answer the following questions.

Which convention is also refered to as the Vienna Convention on sale of goods ?

CISG

The correct answer is Option (3) → CISG 

United Nations Convention on Contracts for the Sale of International Goods (CISG), also referred to as the Vienna Convention on sale of goods, is a multilateral treaty which provides options for avoiding choice of law issues by providing a framework of accepted substantive rules with respect to contract disputes. It is considered one of the most influential documents in private international law, and nowadays is deemed to be incorporated into any otherwise applicable domestic laws, unless expressly excluded.