Consider these four types of risks: credit, foreign exchange, market, and sovereign. These risks can be separated

Question:

Consider these four types of risks: credit, foreign exchange, market, and sovereign. These risks can be separated into two pairs of risk types in which each pair consists of two related risk types, with one being a subset of the other. How would you pair off the risk types, and which risk type could be considered a subset of the other type in the pair?