This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Pathology
The size of the red blood cells is measured by 
Select and explain. 
A. MCV, B. MCHC tumour, C. ESR tumour, D. MCH
A: MCV
Answer: A: MCV 
Explanation: (MCV) (361 - HM) (422- Basic pathology 8th)* Mean corpuscular volume (MCV) =PCV in L/L---------RBC count / L= Normal value is 85 +-8 pg (77 - 93 p1)* Mean corpuscular haemoglobin (MCH) =Hb/L---------RBC count / L= normal range is 29.5 +- 2.5 pg (27 - 32 pg)* Mean corpuscular haemoglobin concentration (MCHC) =Hb/dl-------DCV in L/ L * Normal value is 32.5 +- 2.5 g / dL (30 - 35 g/dL)* Since MCHC is independent of red cell count and size