Regarding carbon dioxide transport in blood, which statement is INCORRECT?

• A. oxygen is about 20 times less soluble in blood
• B. deoxygenation of blood increase its ability to carry carbon dioxide
• C. arterial blood transports about 20% in dissolved form
• D. venous blood has higher haematocrit than arterial blood
• E. carbamino compounds are formed by reaction with both plasma proteins and Hb