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: Social & Preventive Medicine
Biological value is used for assessment of – 
Select and explain. 
A. Fat quality, B. Protein quality, C. Carbohydrate quality, D. None of the above
B: Protein quality
Answer: B: Protein quality 
Explanation: Biological value (BV) 

It is the percentage of absorbed nitrogen retained by the organism.

BV = Retained nitrogen / Absorbed nitrogen x 100