Read the sentence below:

My English teacher was very practical. She had a lot of comma sense

Which correctly explains the pun in this sentence and the word or words on which it is built?

English—ironic because of the error in the sentence

Very—a suggestion that the opposite is true

Practical—teachers have little practical knowledge

Comma sense—a play on the phrase common sense

The sentence that correctly explains the pun in the sentence and the words on which it is built is the following one: Comma sense- a play on the phrase common sense.

Explanation:

The sentence above is talking about an English teacher, a person who has studied grammar and teaches it for a living. What is more, the person describing this teacher is saying that she is practical. That is why she has a lot of common sense. Therefore, the pun lies on the spelling of this phrase, "common sense", because instead of writing "common", the writer used "comma", which has a similar pronounciation. Besides, a punctuation mark such as a comma is part of the scope of study of an English teacher.