An idiom/phrase is given in bold. Following this idiom/phrase are given three sentences, which use the given idiom/phrase. The idiom/phrase may or may not be used correctly in one or more sentences. Identify the sentence(s) that use(s) the idioms/phrases incorrectly either in grammar or context and mark the answer accordingly. Cut the Gordian Knot  
I. The mediator helped to cut the Gordian knot by suggesting a very simple compromise.
II. Instead of debating endlessly, the manager decided to cut the Gordian knot and implement the policy.
III. Rahul cut the Gordian knot when he tied the shoelace perfectly at one go. Which sentence(s) use(s) the idiom incorrectly?