Question: Which among the following is incorrect about different cells in Phloem?
Options
A : Sieve tubes are tubular cells with perforated walls with large vacuoles, peripheral cytoplasm and without nucleus
B : Companion cells are specialized parenchyma cells that help in regulation of metabolic activities
C : Phloem parenchyma cells are elongated cylindrical cells that support sieve tubes
D : Phloem fibers are living cells with extremely thick cell walls and provide mechanical strength
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