This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Anaesthetic equipments, Subject name: Anaesthesia
All increase CO2 absorption in circuit except. 
Select and explain. 
A. Resistance in circuit, B. High flow, C. Small granule size, D. Medium granule size Chanelling
A: Resistance in circuit
Answer: A: Resistance in circuit 
Explanation: Factors that increase the rate of CO2 absorption are rate of flow of gas, granule size and channeling. The most common granule size used is 4 to 8 mesh units Channeling increases the surface area of granules that enables more CO2 absorption