Master Canadian Nursing Abbreviations

There are a few reasons why the other options are incorrect. A is not the full text because TB can refer to more than just a bacterium. B is not correct because trace back can be written as one word. D is not complete because TB can also stand for things like "tracheal bronchitis" or "toilet bowl." C, or tuberculosis, is the most commonly known definition for TB, which is why it is the correct answer.