Which one of the followings is used in the synthesis of polythene ?

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Q: 71 (RAS/2011)

Which one of the followings is used in the synthesis of polythene ?

question_subject: 

Science

question_exam: 

RAS

stats: 

0,39,19,10,39,7,2

keywords: 

{'polythene': [0, 0, 0, 1], 'ethylene': [2, 0, 0, 2], 'synthesis': [4, 0, 0, 9], 'methane': [0, 0, 0, 5], 'propane': [1, 0, 4, 4], 'butane': [0, 0, 5, 5]}