Which of the following are complex tissues?

1.	Which of the following are complex tissues?
A.	Parenchyma and collenchyma
B.	Collenchyma and sclerenchyma
C.	Xylem and phloem
D.	Xylem and Parenchyma
Answer» D. Xylem and Parenchyma

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Which of the following are complex tissues?

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