Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?

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Q: 88 (IAS/2012)
Which one of the following sets of elements was primarily responsible for the origin of life on the Earth?
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question_subject: 

Science

question_exam: 

IAS

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0,117,69,49,117,12,8

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{'elements': [0, 0, 2, 5], 'hydrogen': [0, 0, 1, 3], 'carbon': [1, 0, 4, 5], 'nitrogen': [1, 1, 0, 2], 'potassium': [1, 0, 0, 2], 'oxygen': [3, 0, 1, 0], 'phosphorus': [1, 0, 1, 0], 'earth': [0, 1, 1, 1], 'calcium': [2, 0, 0, 4], 'sodium': [10, 2, 12, 23], 'sets': [4, 3, 5, 2]}