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

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

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

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