With reference to a normal human being which one of the

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With reference to a normal human being which one of the following statements is not correct?

1. Compared with skeletal muscles, the tissues of intestine are mush more affected by the shortage of oxygen.
2. In the arterial blood. haemoglobin is normally 97% saturated with oxygen
3. Pulmonary artery contains deoxygenated blood.
4. About 70% of the carbon dioxide entering the erythrocytes react with the water to form carbonic acid.

Correct Option: A

N/A