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Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

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Which of the following lenses would you prefer to use while reading small letters found in a dictionary?

(a) A convex lens of focal length 50 cm

(b) A concave lens of focal length 50 cm

(c) A convex lens of focal length 5 cm

(d) A concave lens of focal length 5 cm

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(c) A convex lens of focal length 5 cm

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