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Q.

Iron first appeared around


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a

100 years ago

b

200 years ago

c

3000 years ago

d

300 years ago  

answer is C.

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Detailed Solution

  Around 3000 years ago, iron first appeared.
The megalithic burials had some of the greatest iron implements and weapons assemblages. There is evidence of an increase in the usage of iron tools beginning around 2500 years ago. Among these were the iron ploughshare and axes used for clearing forests. The usage of the ploughshare helped boost agricultural output. Without the assistance of a thriving agricultural sector, the monarchs and kingdoms would not have been able to exist.
 
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