This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematopoeisis: Basic concepts, Subject name: Pathology
Linzenmeyer is used to measure: 
Select and explain. 
A. Bleeding time, B. Clotting time, C. Prothrombin time, D. ESR
D: ESR
Answer: D: ESR 
Explanation: - Linzenmeyer is old technique used to measure eythrocyte sedimentation rate.