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The solid angle subtended by the periphery of an area `1 cm^2` at a point situated symmetrically at a distance of 5 cm from the area i s ...........

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The solid angle subtended by the periphery of an area `1 cm^2` at a point situated symmetrically at a distance of 5 cm from the area i s ........... steradian.
Options:
(a) `2 xx 10^(-2)` (b) `4 xx 10^(-2)` (c) `6 xx 10^(-2)` (d) `8 xx 10^(-2)`

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