VIENNA (Reuters) - Billionaire investor George Soros thinks a country will eventually exit the euro zone and urged policymakers on Sunday to come up with a "plan B" that could rescue the European Union from looming economic collapse. (http://feeds.feedburner.com/~ff/reuters/topNews?d=yIl2AUoC8zA) (http://feeds.feedburner.com/~ff/reuters/topNews?i=dKwsxzrZZko:dsIxoHbYuAI:V_sGLiPBpWU) (http://feeds.feedburner.com/~ff/reuters/topNews?i=dKwsxzrZZko:dsIxoHbYuAI:-BTjWOF_DHI) (http://feeds.feedburner.com/~r/reuters/topNews/~4/dKwsxzrZZko)