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[" 37.A circle passes through the points "A(1,0)" and "B()],[" and touches the "y" -axis at "C(0,h)" .If "/_ACB" is maxin "],[" then "],[[" a."h=3sqrt(5)," b."h=2sqrt(5)," c."h=sqrt(5)," d."h=2sqrt(1)]]

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