This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
Tall R wave in ECG represents: 
Select and explain. 
A. Right atrial overload, B. Left atrial overload, C. Right ventricular hypertrophy, D. All of the above
C: Right ventricular hypertrophy
Answer: C: Right ventricular hypertrophy 
Explanation: Right ventricular hypertrophy due to a sustained, severe pressure load (e.g. due to right pulmonary valve stenosis or certain pulmonary artery hypertension syndromes) is characterized by a relatively tall R wave in lead V, (R >S wave), usually with right axis deviation.