Which of the following is made up of dead cells?
Option 1 : Phellem
Option 2 : Collenchyma
Option 3 : Phloem
Option 4 : Xylem parenchyma
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Which of the following is made up of dead cells?
Option 1 : Phellem
Option 2 : Collenchyma
Option 3 : Phloem
Option 4 : Xylem parenchyma