The correct answer is B. up.
The word “up” is used in the phrase “make up a story” to mean “to invent a story”. In this case, the student made up a story about why he was late for class, but the teacher didn’t believe him.
The other options are not correct because they do not make sense in the context of the sentence. The word “in” is used to indicate a location, but there is no location mentioned in the sentence. The word “for” is used to indicate a purpose, but there is no purpose mentioned in the sentence. The word “none of these” is not a correct answer because it does not identify the correct word.