Choose the word which is different from the rest.

Rial
Knesset
Guilder
Drachma

The answer is B. Knesset.

A rial is a unit of currency in Iran, Oman, and Yemen. A guilder is a former unit of currency in the Netherlands, Indonesia, and Suriname. A drachma is a former unit of currency in Greece. A Knesset is the unicameral legislative body of Israel.

The Knesset is different from the other options because it is not a unit of currency. It is a legislative body.