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
Zinc deficiency is characterized by 
Select and explain. 
A. All of the below, B. Poor growth, C. Poor wound healing, D. Sexual infantilism
A: All of the below
Answer: A: All of the below 
Explanation: None