In order to increase his grip, a kabaddi player rubs his hands with .
A
sand
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B
water
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C
grease
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D
oil
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Solution
The correct option is A sand Applying oil, grease or water would make the player's palms slip as it would decrease grip or interlocking. Rubbing his hand on a coarse material like sand would prevent it from slipping and thereby increasing the grip and thus the frictional force.