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Option 4 : Neither conclusion I nor conclusion II follows
Based on information given Venn diagram can be drawn as,
[ alt="19.07.2018.008" src="//storage.googleapis.com/tb-img/production/18/07/19.07.2018.008.PNG" style="height:88px; width:261px">
Conclusion I: Some nitrogen are air False
Conclusion II: All gases are nitrogen False
Clearly neither conclusion I nor conclusion II follows.
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