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.
Bite the bullet
I. The doctor told him to bite the bullet and take the painkiller before the surgery.
II. Instead of complaining, she decided to bite the bullet and finish the difficult project.
III. He was so hungry that he had to bite the bullet and eat the entire meal in one go.
Which sentence(s) use(s) the idiom incorrectly?