Four convergent lenses have focal length...

Four convergent lenses have focal lengths `100cm, 10cm, 4cm` and `0.3cm`. For a telescope with maximum possible magnification, we choose the lenses of focal lengths

`100 cm, 0.3 cm`

`10 cm, 0.3 cm`

`10 cm, 4 cm`

`100 cm, 4 cm`

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