The correct answer is B. won’t I.
The sentence “If I take a state roadways bus, I’ll get late” is a conditional sentence. The first part of the sentence, “If I take a state roadways bus,” is the condition. The second part of the sentence, “I’ll get late,” is the result.
The question “won’t I” is a tag question. Tag questions are used to ask for confirmation or agreement. In this case, the tag question is asking for confirmation that the speaker will get late if they take a state roadways bus.
The other options are incorrect because they do not make sense in the context of the sentence. Option A, “isn’t it,” is a statement, not a question. Option C, “will I,” is the opposite of the correct answer. Option D, “is it,” is also a statement, and it does not make sense in the context of the sentence.
In conclusion, the correct answer to the question “If I take a state roadways bus, I’ll get late, …… ?” is B. won’t I.