This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
[{'content': 'The size of the red blood cells is measured by - \nSelect and explain. \nA. MCV, B. MCHC, C. ESR, D. MCH', 'role': 'user'}, {'content': 'Answer: A \nExplanation: MCV-Mean cell volume is the average volume of a red cell in femtolitres.ie it measures the size of RBC MCHC -Mean cell hemoglobin concentration is the average concentration of haemoglobin in given volume of packed RBC expressed in grams per decilitre. MCH -Mean cell hemoglobin is the average content of Hb per red cell expressed in pico grams. ESR is the erythrocyte sedimentation rate. Reference : Robbins and Cotran Pathologic basis of disease.South Asia Edition volume 1.page no.630', 'role': 'assistant'}]