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Two thin lenses, when in contact, produc...

Two thin lenses, when in contact, produce a combination of power `+10` dioptres. When they are `0.25m` apart, the power is reduced to `+6` dioptres. The power of the lenses in dioptres, are

A

1 and 9

B

2 and 8

C

4 and 6

D

5 each

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The correct Answer is:
B
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