Which important process is performed on the woody tissue of plants to produce pulp in the paper industry?

  • A
    Removing water from wood by keeping it at $50^{\circ}C$ for a long time.
  • B
    Giving chemical treatment to wood to break down cellulose.
  • C
    Removing oil from wood by treating it with appropriate chemicals.
  • D
    Removing lignin to obtain pure cellulose from wood.

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