Which of the following reactions occur in a capillary in the lungs? 1. Carbonic acid is produced from carbon dioxide and water. 2. Carbaminohaemoglobin is produced from carbon dioxide and haemoglobin. 3. Haemoglobinic acid is produced from haemoglobin and hydrogen ions. 4. Carbon dioxide and water are produced from hydrogencarbonate ions and hydrogen ions.
- A1 and 2
- B3 and 4
- C3 only
- D4 only