What is the element that is in the highest percentage in the composition of the earth ?

(a) Silicon / सिलिकॉन
(b) Oxygen / ऑक्सीजन
(c) Magnesium / मैगनीशियम
(d) Iron / लोहा

 

Answer/ उत्तर  : – Oxygen / ऑक्सीजन

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