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{:(,"Column I",,"Column II"),(1.,"Unit o...

`{:(,"Column I",,"Column II"),(1.,"Unit of work",a.,"Kinetic energy"),(2.,"Unit of power",b.,"potential energy"),(3.,"Energy present in",c.,"newton"),(,"compressed spring",d.,"joule"),(4.,"Energy present in",e.,"joule second"^(-1)),(,"the bullet released",,),(,"from the gun",,):}`

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The correct Answer is:
(1-d), (2-e), (3-b), (4-a).
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