Option D) The amount of oxygen delivered to the respuring tissue for a given partial pressure of oxygen would be lower than normal.
2,3 DPG has affinity towards deoxygenated haemoglobin and binds to it rather than oxygenated haemoglobin. When it binds to deoxygenated haemoglobin, it also forces some bound oxygen to be released. This allows oxygen to be released in tissues that require it. So, an increase in concentration of 2,3-DPG increases amount of oxygen delivered to the tissues while a decrease in its concentration as in this case ( a drug which prevents its binding to haemoglobin) would decrese the amount of oxygen delivered to tissues.
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