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A person with a defective sight is using...

A person with a defective sight is using a lens having a power of `+2D` . The lens he is using is

A

Concave lens of focal length` 0.5` m

B

Convex lens of focal length `2.0` m

C

Concave lens with focal length `2.0` m

D

Convexlens with focal length `0.5` m

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The correct Answer is:
4
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