The occupational theory of drug-receptor interaction states that a. The magnitude of the drug response is proportional to the number of receptors occupied b. A partial agonist has intrinsic activity but no affinity for the receptor site
c. An antagonist drug has affinity but no intrinsic activity
d. The rate at which the drug-receptor complex associates and dissociates determines drug efficacy
e. The degree of drug action is dependent on the law of mass
action

(a), (c) and (e)

(a), (b) and (c)

(b), (c) and (d)

(b) and (e)

(c), (d) and (e)