The remains of which era of Chirand (Saran) and Chechar (Vaishali) have been found in Bihar?

The remains of which era of Chirand (Saran) and Chechar (Vaishali) hav

1.	The remains of which era of Chirand (Saran) and Chechar (Vaishali) have been found in Bihar?
A.	middle stone age
B.	pre-stone age
C.	Middle Stone Age
D.	Neolithic Age
Answer» E.