In the year 1925, who extracted lipids from an erythrocyte sample and found that lipid monolayers are good for measuring molecular surface area versus lateral pressure?

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Step-by-step explanation:

1. Historical experiment: In $1925$ Gorter and Grendel extracted lipids from erythrocytes and spread them as a monolayer on a water surface.
2. Measurement: They measured the molecular surface area versus lateral pressure for the lipid monolayer and compared the total monolayer area to the cell surface area.
3. Key result: The monolayer area was about twice the measured cell surface area, leading to the inference of a lipid bilayer (ratio roughly $2:1$, i.e. $A_{	ext{monolayer}}\approx 2A_{	ext{cell}}$).
4. Conclusion: This classic 1925 study demonstrating lipid monolayers for surface-area measurements is attributed to Gorter and Grendel, so option (1) is correct.

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