The dead cell component present in phloem is(a) Phloem fibers(b) Companion cells(c) Phloem parenchyma(d) Sieve tube

The correct answer is (a) Phloem fibers.

Detailed explanation:

Phloem is a complex tissue in plants responsible for transporting organic nutrients, particularly sugar, from the leaves to other parts of the plant. It consists of the following components:

Phloem fibers (also called bast fibers): These are the only dead cells in the phloem. They are elongated, sclerenchymatous cells that provide mechanical support to the plant. Being dead at maturity, they lack protoplasm.

Companion cells: These are living cells closely associated with sieve tube elements. They help in the functioning of sieve tubes by assisting in the transport of nutrients.

Phloem parenchyma: These are living cells that store food and other substances like resins and tannins. They also aid in lateral conduction.

Sieve tubes: These are living cells without a nucleus at maturity. They are responsible for the conduction of food materials through the phloem.

Since phloem fibers are the only non-living (dead) cells in the phloem, the answer is (a) Phloem fibers.