It was said that cell surface receptors are transmembrane proteins

In the cell membrane video,it was said that cell surface receptors are transmembrane proteins,here the mcq states that it is a peripheral protein,which according to video helps in the skeletal framework of cells,is cell surface receptor a transmembrane protein or peripheral protein?

Cell surface receptors are peripheral proteins cuz they are present only on the outer cell surface-thus one side only

Transmembrane proteins span across both outer and inner cell membrane and hence present on both sides