In a Credit Default Swap, the protection seller buys the reference bond at its face value from the protection buyer in case of the default event of the issuer of the reference bond. What option position of the following is most similar with the protection seller's position? (1) long call; (2) shot call; (3) long put; (4) short put; [All options are written on the reference bond.] 5 When a counon bond pays counon at the same rate as its market vield the counon bond is priced at par That is its market price