A trace element is

Options :
  1. required in very minute amounts
  2. a radioactive and can be traced by Geiger counter
  3. a element which draws other element out of protoplasm
  4. all the above

Answer and Explanation :-

Answer: Option 1


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To know you are ignorant is the beginning of wisdom," Viviane said. "Then, when you begin to learn, you will not have to forget all the things you think you know.
-Marion Zimmer Bradley The Mists of Avalon