True about heterophilic receptors?

True about heterophilic receptors?
a) Involved in binding of GH to cell membrane
b) Bind to same ligand/hormone
c) Involved in cell adhesion
d) All are correct
Correct Answer - C
Ans. C. Involved in cell adhesion
[Ref Textbook of clinical pathology p.1132]
Cell-cell and cell-tissue-interactions occur through following
types of receptors:
Homophilic & heterophilic receptors.
Heterophilic receptors:
These receptors recognize distinct ligands (called adhesion
epitopes) of opposing cell membranes or tissue (called “lock and key
bonds” or “links”).