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The concept of retractable roller skates, mentioned in the last sentence, would be best explained as 

A  An evolutionary variation of claws 

B   A complex structure of living tissue 

C  An example of human intervention in natural development 

D  A new discovery by evolutionists 

E  A flawed concept. 

Solution

Correct Answer: Option A

Solution: 

 শেষের বাক্যটিতে Concept of retractable roller skates কে Evolutionary variation of claws 

দ্বারা Best explain করা যাবে । তাই উত্তর a) An evolutionary variation of claws. 

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