This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Nutrition, Subject name: Pediatrics
Which one of the following is not the characteristic feature of kwashiorkor? 
Select and explain. 
A. Hair and skin changes, B. Muscle wasting, C. Growth retardation, D. Psychomotor changes
B: Muscle wasting
Answer: B: Muscle wasting 
Explanation: Muscles of the upper limb are wasted, but the lower extremities appear swollen. Muscle wasting is masked by well-preserved subcutaneous tissue and edema. Ref: Page 105, Ghai essential pediatrics; 6th edition