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: Surgery
During nutritional assessment of a surgical patient, the status of muscle protein is indicated by which one of the following parameters - 
Select and explain. 
A. Serum albumin, B. Triceps skin fold thickness, C. Mid-arm circumference, D. Hb level
C: Mid-arm circumference
Answer: C: Mid-arm circumference 
Explanation: • Anthropometric techniques incorporating measurements of skinfold thicknesses and mid-arm circumference permit estimations of body fat and muscle mass, and these are indirect measures of energy and protein stores.
• Skinfold thickness is measured at ulnar, triceps, subscapular and suprailiac region.