Following are the four factors that are responsible for the oxyhaemoglobin in alveoli:\\\\(pO_2\\\\):The greater the partial pressure of the oxygen causes the binding of hemoglobin with the oxygen efficiently.\\\\(Temperature\\\\): The normal temperature favors the binding of hemoglobin with oxygen. The high temperature is responsible for the dissociation of the oxygen from haemoglobin.\\\\(pCO_2\\\\): The large amount of the carbon dioxide decreases the formation of the oxyhaemoglobin. The carbon dioxide has more affinity for haemoglobin than with the oxygen.\\\\(H^+\\\\): The increase in the hydrogen ion concentration or decrease in pH causes the increases in the dissociation of haemoglobin.Thus, a high \\\\(pCO_2\\\\) is not favourable for the formation of oxyhaemoglobin.So, the correct answer is (D).