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.
Throw in the towel
I. After losing the first two sets, the tennis player decided to throw in the towel.
II. Despite failing the exam, he refused to throw in the towel and studied harder.
III. She accidentally threw in the towel while doing laundry and couldn’t find it later.
Which sentence(s) use(s) the idiom incorrectly?