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Which of these facts sugests that oxygen is transported from lungs to the tissues combined with haemoglobin rather than dissolved in blood plasma:

[A].	Haemoglobin can combine with oxygen	[B].	Oxygen carrying capacity of whole blood is higher than that of plasma
[C].	Oxyhaemoglobin can dissociate into haemoglobin and oxygen	[D].	Increase in CO2 concentration decrease the O2 affinity of haemoglobin

Answer: Option B