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Newlands found every eighth element repeated the properties of the first, like notes in:

APoetry
BDrawing
CDancing
DMusic
Answer & Solution
Correct answer: D. Music
1. He needed a comparison for the repeat. 2. An octave is a musical idea. 3. So he compared it with music. _Source: syllabus Science Class X, Chapter 5, Periodic Classification of Elements._
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