Who among the following proposed the sandwich model of plasma membranes?

Correct option is A

The correct answer is: A) Davson and Danielli Explanation: Davson and Danielli proposed the "sandwich model" with a phospholipid bilayer coated with proteins on both sides. It was later modified by the fluid mosaic model.
Information Booster:
Proposed in 1935.
Replaced by Singer and Nicolson's model in 1972.