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In a portal system:

[A].	A vein starts from an organ and terminates into the heart	[B].	A vein breaks up in an organ into capillaries and restarts by their reunion as a new vein in that organ
[C].	An artery breaks up in an organ and restarts by union of its capillaries	[D].	The blood is brought into alimentary canal before it is poured into posterior vena cava

Answer: Option B