SEOUL, March 31 : Shin Hyun-song, nominee for the governor of Bank of Korea, said on Tuesday that the central bank needs "flexible" monetary policy to deal with rising risks from the Iran war. Shin said at a meeting with reporters that the current level of the Korean won was not concerning and that liquidity was good. The currency hit the weakest level against the U.S. dollar since March 2009 in Seoul trading. Shin said he sees the crisis in the Middle East as the biggest risk to the Korean