A. Xylem vessels
A.
B. Collenchyma
B.
C. Sclerenchyma
C.
D. Phloem fibers
D.
Correct Answer: B
সঠিক উত্তর: B
Explanation
ব্যাখ্যা
Collenchyma cells are living cells with thickened cell walls, particularly at the corners, that provide mechanical support to young, growing parts of a plant like stems and petioles. They offer flexibility while also providing structural strength.