5. Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal tength 0.25 m
(b) A convex lens has4 dioptre power having a focal length 0.25 m
(c) A concave lens has 4 dioptre power having a focal length 0.25 m
(d) A concave lens has-4 dioptre power having a focal length 0.25 m
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Answer:
D is the correct answer as per scientific research
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