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: Pathology
Not included in type-I nutrient element 
Select and explain. 
A. Mg, B. Ca, C. Zn, D. K
C: Zn
Answer: C: Zn 
Explanation: Type 1 nutrients Type 2 nutrients All VitaminsMost Trace Elements Iron IodineCopper SeleniumCalciumNitrogenSulphurEssential Amino Acids SodiumMagnesiumPhosphorusZinc Water (Refer: OP Ghai's Essential of paediatrics, 8thedition, pg no: 78)