Select the correct statements regarding the flow of sap in xylem? I. Flow is driven by higher co...

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Select the correct statements regarding the flow of sap in xylem?
I. Flow is driven by higher concentration of sugar in the vessel elements.

II. Flow from root to twigs and leaves would be reduced if leaves are removed.
III. In the morning, sap begins to flow first in the twig then in trunk.
IV. Rapid flow of water put tissues under pressure much more than atmospheric pressure.
(a) I and IV
(b) II and III
(c) I, II, III and IV
(d) No one is correct
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