You have to put up your question so we can help you.
The same ligand can bind to different receptors causing different responses (e.g.. acetylcholine). On the other hand, different ligands binding to different receptors can produce the same cellular response (e.g. glucagon, epinephrine).
The answer is called Scope. Hope this helps.
I think it would be
C. One of her parents had type B blood and the other type A blood
If I’m wrong I’m sorry...
