<prompt> Which of the following statement s isare true about HbO2 dissociation curvea Fetal Hb shifts curve to leftb Hypothermia shifts curve to leftc Hypercarbia shifts curve to leftd Left shift cause more O2 release to tissueabaadbc  <response>: Hb-O2 dissociation curve shift to left indicates more affinity of Hb to O2, and thus less delivery of O2 to tissues. Shift to left seen in- Increased pH- Decreased 2,3 DPG, temperature, PCO2- HbF Fetal Shift to right seen in- Decreased pH- Increased 2,3DPG, temperature, PCO2- HbS Sickle cell 