Basic General Knowledge
Nowadays many novel chemicals are being synthesized termed as xenobiotics. The unique feature of these is what they are I.biodegradable II.non- biodegradable III.pose on environmental threat IV.they are environment friendly

II, III, IV
I, III, IV
II, III
I, III

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Basic General Knowledge
What was the purpose of establishment of NATO?

None of these
TO provide collective defence and economic cooperation in south-east Asia
To maintain and develop individual and collective capacity to resist armed attack
To defend economic and trade interests of the developing nations of the world

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