Consider the following:

1. Exchange-Traded Funds (ETF)

2. Motor vehicles

3. Currency swap

Which of the above is/are considered financial instruments?

The correct option is 1 and 3 only.

To understand why this is correct, let us analyze the definition of a financial instrument and evaluate each of the given items:
A financial instrument is a contract that gives rise to a financial asset of one entity and a financial liability or equity instrument of another entity. In simpler terms, they are monetary contracts that can be created, traded, modified, and settled.

Let's evaluate the given items:
1. Exchange-Traded Funds (ETFs): An ETF is a type of pooled investment security that holds underlying assets (such as stocks, bonds, or commodities) and trades on a public stock exchange. Since it represents a tradeable contract indicating ownership in a basket of financial assets, it is classified as a financial instrument.
2. Motor vehicles: A motor vehicle is a physical, tangible asset (often referred to as a real or non-financial asset). Although it has monetary value, it is not a contractual financial claim or agreement. Therefore, it is not a financial instrument.
3. Currency swap: A currency swap is a derivative contract in which two parties exchange principal and interest payments denominated in different currencies. Because it is a contract that creates mutual financial obligations and claims, it is classified as a financial instrument.

Since only Exchange-Traded Funds (1) and Currency swaps (3) are financial instruments, the correct answer is indeed 1 and 3 only.