Concept: Synonyms are words that have the identical meaning as a given word. Generally, words within the English language have many synonyms bearing similar meanings. 

• A thesaurus could be a book that contains of these synonyms in one place.
• Let us take a look at some samples of synonyms.
• Irregular is an adjective that denotes something that's occasional or scattered.
• Sporadic is another adjective that may be wont to describe this same meaning in one word.
• Similarly, allow us to observe the adjective benevolent. we are saying that somebody is benevolent after they are very generous.
• Thus, generous is another adjective that has the identical meaning as benevolent and it is employed in its place.
• In our question, we've been given the word discernible. allow us to consider what its meaning is. When something is discernible, it is made out clearly, i.e. it's in plain sight.
• This meaning is best described by the word noticeable. Therefore, option B is that the correct answer.

Hence, option B is the correct answer.