Oxygen-haemoglobin dissociation curve is useful in studying the effect of which of the following on the binding of oxygen to haemoglobin?

Oxygen-haemoglobin dissociation curve is useful in studying the effect of pCO2, pH and temperature on the binding of oxygen to haemoglobin. High    pCO2, low pH and high temperature shift the curve to the right while low pCO2, high pH and low temperature shift the curve to the left.