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M is a point on y-axis at a distance of $4$ units from x-axis and it lies below the x-axis. The distance of point M from point Q $(5, 1)$ is :
- (a)$\sqrt{2}$ units
- (b)$\sqrt{34}$ units
- (c)$\sqrt{50}$ units
- (d)$\sqrt{90}$ units
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(C) $\sqrt{50}$ units