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Lignin is a heterogeneous polymer made up of phenylpropane subunits, interconnected through multiple types of chemical linkages.

1. True
2. False
3. Both true and false
4. None of these

Correct answer: True

Solution

Lignin is indeed a complex polymer made up of phenylpropane units that are cross-linked through various chemical bonds, providing rigidity and structural support to plant cell walls.

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