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[" A magnifying glass is made of a "],["...

[" A magnifying glass is made of a "],[" combination of a convergent lens of "],[" power "20D" and divergent lens of power "],[" 4D.If the least distance of distinct vision "],[" is "25cm." The magnifying power is "],[[" (A) "7,5],[" (B) "," (C) "3],[" (D) "8]]

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