Nearer to the medullary cavity, the is marked by an expansive production of chondrocytes that align in rows in order to replenish those undergoing calcification.
(a)-zone of cell proliferation
(b)- zone of hypertrophy
(c)- zone of calcification
(d)- zone of deposition

The correct answer is option (a)-"zone of cell proliferation".

Explanation:

Chondrocytes are cells within healthy cartilage, that secrete the cartilage's matrix and gets embedded in it. The zone of cell proliferation in bone development is found near the medullary cavity. In this zone, an expansive production of chondrocytes that align in rows is found and the cartilage matrix becomes more basophilic.

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