<prompt> The shift of O2 - Hb dissociation curve to the left is due toExerciseAcidosisHypothermiaAdult hemoglobin  <response>: O2Dissociation Curve OdcGraphical representation between PO2 percentage saturation of Hb. Normal is S-shapedsigmoid shapedShift to the Right Releasetissues increased P50 decreased affinityShift to the Left Lungsbinding decreased P50 increased affinityIncreased PCO2, Increased temperatureIncreased 2, 3-DPG as in Growth hormone, Exercise, Hypoxia, High altitude, AnemiaAcidosis decreased pHSickle cell anemia Adult HbDecreased PCO2, Decreased temperatureDecreased 2, 3-DPG as inAlkalosis increased pHFetal Bb, Stored bloodRefer: Ganong;s Review of Medical physiology 24th edition,pg no: 642-643 