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#Question id: 54


About 25 of the 92 natural elements are known to be essential to life. Which 4 of these 25 elements make up approximately 96% of living matter?

#XL - Q Biochemistry
  1. carbon, sodium, hydrogen, nitrogen

  2. carbon, oxygen, phosphorus, hydrogen

  3. oxygen, hydrogen, calcium, nitrogen

  4. carbon, hydrogen, nitrogen, oxygen


Answer:- Option(s): 4


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