Haldane effect: (A) Effect of 2,3 -BPG, (B) Dissociation of CO2 on oxygenation, (C) Dissociation of O2 on addition of CO2, (D) Chloride shift
Answer is B. Because deoxyhemoglobin binds more H+ than oxyhemoglobin does and forms carbamino compounds more readily, binding of O2 to hemoglobin reduces its affinity for CO2 (Haldane effect).Ref: Ganong review of medical physiology 23rd edition Page no: 612