A cell will swell up if
(a) The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium
(b) The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell
(c) The concentration of water molecules is same in the cell and in the surrounding medium
(d) Concentration of water molecules does not matter

(b)is the answer as osmosis occurs when water molecules transfers from a region of higher concentration to a region of lower concentration.this occurs when the medium is a hypotonic solution.
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a
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Archita, are you sure?
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