The polio virus is a ..........
- APlant virus
- BAnimal virus
- CBacteriophage
- DResponsible for nodule disease
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A small body is released from a height $H$ of an inclined plane. At the bottom of the plane is a loop of radius $R$ as shown in the figure below. Ignoring friction, the minimum $H$ required for the body to just complete the loop (that is, reach the point $O$ ) is
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