Which of the following statements regarding currency derivatives and interest rate derivatives is NOT true?

	a.	Both currency and interest rate futures contract are marked to market and have daily cash settlements.
	b.	Both currency and interest rate futures contracts are standardized contracts with standardized amount of currencies involved and standardized maturities.
	c.	Both currency and interest rate futures contracts are traded on a specific exchange.
	d.	Both currency and interest rate futures contracts require physical delivery of the principal amount of currencies involved.