Answers
option D is correct . it is beacuse pressure = force/ area
.The weight of the persion is same in both cases.
In case the when the person is layins on nails in that case the total area in contact with the nails is much graeter than the case case in which he is standing.
As we know : Pressure = Force /Area = Weight/Area
So, the pressure is less when he is laying because the area of contact is much greater than that when he is standing
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