Consider the following sentences, Which of these combinations is true?

Consider the following sentences, Which of these combinations is true?

1) A base currency can be assigned to an exchange rate type.

2) To deal with exchange rate spreads, two very efficient combinations of the exchange rate tools are using a base currency for the average rate (M) and using the exchange rate spreads to calculate the buying and selling rates (B and G).

3) A base currency can be used for an average, a buying or a selling rate.

4) The relations between currencies have to be maintained per exchange rate type and currency pair in the translation factors.

Please choose the correct answer.

Response: