The correct option is C Singer and Nicholson
Fluid mosaic model of plasma membrane was given by singer and nicholson in year 1972. The biological membrane are considered to be a quasi-fluid structure in which the lipids and integral proteins are arranged in a mosaic manner.
Gorter and Grendel measured the lipid content of haemolysed erythrocytes and concluded that cell membrane are chiefly formed of phospholipids arranged to form a bimolecular lipid sheet.
So, the correct answer is option C.