A. Parenchyma
A.
B. Collenchyma
B.
C. Phloem
C.
D. Xylem
D.
Correct Answer: A
সঠিক উত্তর: A
Explanation
ব্যাখ্যা
The pith is the soft, spongy central region of a stem, primarily composed of parenchyma cells, which are responsible for storage and other metabolic functions.