This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Respiratory System, Subject name: Physiology
All of the followings are responsible for Right shifting of O2 saturation curve; except: 
Select and explain. 
A. Hypoxia, B. Hypocapnia, C. Increase temp, D. Increased 2,3 DPG
B: Hypocapnia
Answer: B: Hypocapnia 
Explanation: Ans. b. HypocapniaThe factors shift the curve to the right:Increased CO2 (Bohr effect)Increased hydrogen ion (decrease pH)Increased temperatureIncreased 2,3-bisphosphoglycerate (2,3-BPG)Shifts in Hb-O2 dissociation curveStored blood loses 2, 3-bisphosphoglycerate, causing a left shift in the curve, while hypoxia stimulates the production of 2,3-bisphosphoglycerate, thereby causing a right shift.Extra MileRight shiftAcidCO2 Exercise2, 3-BPGAltitudeTemperatureMnemonics: ACE BATs right handed