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
Increased functional demand on the heart produces increased size of the myocardium by: 
Select and explain. 
A. Hyperplasia, B. Hypertrophy, C. Calcification, D. Fatty infiltration
B: Hypertrophy
Answer: B: Hypertrophy 
Explanation: None