is responsible for the yellowing of paper.

Cellulose

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Lignin

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Pulp

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Solution

The correct option is B Lignin
Paper is made from wood, which is made up mainly of cellulose. Wood also contains a dark substance in it called lignin, which ends up in the paper, alongwith the cellulose.
It is this lignin when exposed to air and sunlight, gradually turns the paper yellow.

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