Match the components of phloem with their descriptions.

List – I List – II
A Sieve tube elements I Long, tube-like structures with perforated end walls, lacking a nucleus at maturity.
B Companion cells II Specialised parenchymatous cells closely associated with sieve tube elements, helping in maintaining the pressure gradient.
C Phloem parenchyma III Elongated, tapering cells that store food material, resins, latex, and mucilage.
D Phloem fibres IV Sclerenchymatous cells, absent in primary phloem but present in secondary phloem, used commercially in jute, ﬂax, and hemp
A B C D
1 II I IV III
2 I II III IV
3 I III IV II
4 IV I II III

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answer is B.

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Detailed Solution

Sieve tube elements	Long, tube-like structures with perforated end walls, lacking a nucleus at maturity.
Companion cells	Specialised parenchymatous cells closely associated with sieve tube elements, helping in maintaining the pressure gradient.
Phloem parenchyma	Elongated, tapering cells that store food material, resins, latex, and mucilage.
Phloem fibres	Sclerenchymatous cells, absent in primary phloem but present in secondary phloem, used commercially in jute, ﬂax, and hemp

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	List – I		List – II
A	Sieve tube elements	I	Long, tube-like structures with perforated end walls, lacking a nucleus at maturity.
B	Companion cells	II	Specialised parenchymatous cells closely associated with sieve tube elements, helping in maintaining the pressure gradient.
C	Phloem parenchyma	III	Elongated, tapering cells that store food material, resins, latex, and mucilage.
D	Phloem fibres	IV	Sclerenchymatous cells, absent in primary phloem but present in secondary phloem, used commercially in jute, ﬂax, and hemp