This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pediatrics
What is the dose of zinc in diarrhea in a one year old child? 
Select and explain. 
A. 10 mg/day for 2 weeks, B. 10mg/day for 4 weeks, C. 10mg/day for 6 weeks, D. 20 mg/day for 2 weeks
D: 20 mg/day for 2 weeks
Answer: D: 20 mg/day for 2 weeks 
Explanation: The dose for treatment of zinc deficiency is 10mg/day for 14 days for infant 2-6 months of age and 20mg/day for 14 days for older than 6 months.(Refer: Nelson's Textbook of Pediatrics, SAE, 1st edition, pg no. 1872 - 1873)