After the collapse of the Maurya Empire, there was a series of invasions. Who among the following attacked India first?

After the collapse of the Maurya Empire, there was a series of invasio

1.	After the collapse of the Maurya Empire, there was a series of invasions. Who among the following attacked India first?
A.	Bactrian / Greek
B.	Parthian
C.	doubt
D.	Kushan
Answer» B. Parthian