FUnction of companion cells is
Providing energy to seive elements for active transport
providing water to phloem
loading of scrose into sieve elements by passive transport
loading of sucrose into sieve elements
Companion Cells -
They are present only in angiosperm, except austrobaileya. Sieve tubes and companion cells are connected by pits, present in longitudinal walls.
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Option 1)
Providing energy to seive elements for active transport
This solution is incorrect
Option 2)
providing water to phloem
This solution is incorrect
Option 3)
loading of scrose into sieve elements by passive transport
This solution is incorrect
Option 4)
loading of sucrose into sieve elements
This solution is correct