Which sentence is not relevant to the paragraph and should be deleted ?

Sentence 4 is not relevant to the paragraph of the book of Don camp well and should be deleted. The correct option is D.
Effect of music states that listening to music will increase your intelligence.
The paragraph is from the book by Don camp well about the effects of music
The book talks about the music of a person and its effect on the intelligence of people who listen to it.
Thus, the correct option is D. sentence 4.
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