Which of the following is a trace essential elements

Options :
  1. P
  2. N
  3. K
  4. Zn

Answer and Explanation :-

Answer: Option 4


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The paths to liberation are numerous, but the bank along the way is always the same, the Bank of Karma, where the liberation account of each of us is credited or debited depending on our actions.
-Yann Martel Life of Pi