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: Biochemistry
A balanced diet consists of: 
Select and explain. 
A. 20% proteins, 25% fats , 50% carbohydrates, B. 20% proteins, 35% fats , 45% carbohydrates, C. 25% proteins, 25% fats , 50% carbohydrates, D. 35% proteins , 15% fats , 50% carbohydrates
A: 20% proteins, 25% fats , 50% carbohydrates
Answer: A: 20% proteins, 25% fats , 50% carbohydrates 
Explanation: None