Only Glucose (Smaller Molecules) diffused through the semipermeable membrane. The correct option is (4).
What is diffusion?
Diffusion is a process of transfer of molecules through a semi-permeable membrane. The process does not need energy, because it moves along the concentration gradient.
In diffusion, starch does not pass through the membrane, only glucose is passed down because only small particles are passed down.
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Thus, option (4). Only Glucose (Smaller Molecules) is correct regarding diffusion.
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