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Yogita Basnal
Option D: 2,3 bisphosphoglyceric acid is right answer. Explaination: 2,3-bisphosphoglyceric acid is formed from 3-phosphoglyceric acid which is the product of glycolysis. When concentration of 2,3-bisphosphoglyceric acid increases it tends to bind the beta chain of deoxy-haemoglobin which causes oxy- hemoglobin dissociation curve to shift in the rightward direction. A shift of Hb - O2 dissociation curve into rightward direction results into unloading of oxygen into the body tissues. This is how oxygen our body tissues get oxygen.