Question

Which of the following cells are living cells ?
a) Fibres
b) Sclereids
c) Vessels
d) Collenchyma
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Answer 1

Answer:

d) collenchyma cells are the living cells

Answer 2

Collenchyma
Reason:
Fibres are sclerenchyma cells. Sclerenchyma are dead cells.

Sclereids are the reduced form of sclerenchyma(dead cells)

Vessels and tracheids are elongated dead conducting cells of xylem.

Collenchyma is living supporting tissue
Hope this helps