The correct answer is Bar examination
When one wants to pursue a legal career, he should study law. After studying law, he needs to prepare for the bar examinations. It is a test intended to determine if one is qualified to practice law in a given jurisdiction.
The words in and of themselves are nouns, if that's the question you're asking.
The correct answer for this question is D
The word would be 'use' because it can be used both as a verb and noun but here is used as the noun. We can tell they want a noun since the word 'correct' is an adjective, which describes only nouns. It wouldn't be 'used' because it is a past tense of the verb.
Or is the answer for your question