Dopamine receptor with inhibitory action?

Dopamine receptor with inhibitory action
?
a) D5
b) Di
c) D2
d) None

Correct Answer - C
Ans. is ‘c’ i.e., D2
Two types of dopamine receptors (D I , D2) were originally
described. Three more (D3, D4, D5) have now been identified and
cloned. All are G protein coupled receptors and are grouped into two
families:
Dl like: (Dl, D5) are excitatory
D2 like: (D2,3,4) are inhibitory