This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following parameters shifts O2 dissociation curve to Right 
Select and explain. 
A. Co poisoning, B. Anaenic hypoxia, C. Anaemia, D. Increase in fetal Hb
C: Anaemia
Answer: C: Anaemia 
Explanation: Co2 poisoning, Anaemic hypoxia and increase in fetal Hb shifts the curve to left.