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Four actions: I When pressed, the wate...

Four actions:
I When pressed, the water present in a rubber dropper rises.
II. A nail is pushed into a wall.
III A postcard remains attached to an inverted glass of water.
IV. When pressed, a rubber sucker gets attached to a wall.
Which of the following actions is not caused by atmospheric pressure?

A

I

B

II

C

III

D

IV

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