The minimum distance of a point on the curve y = x2−4 from the origin is :

Question

The minimum distance of a point on the curve y = x²−4 from the origin is :

${{\sqrt {19} } \over 2}$

$\sqrt {{{15} \over 2}} $

${{\sqrt {15} } \over 2}$

$\sqrt {{{19} \over 2}} $

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