This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous, Subject name: Anaesthesia
For any anesthetics, the basic standards of monitoring include a continuous evaluation of all except 
Select and explain. 
A. Hematocrit, B. Circulation, C. Ventilation, D. Oxygenation
A: Hematocrit
Answer: A: Hematocrit 
Explanation: The basic monitoring standards of the American Society of Anesthesiologists states that "the patient's oxygenation, ventilation, circulation, and temperature shall be continually evaluated.