Where has the National Makhana Board been established?

A. Patna, Bihar 
B. Darbhanga, Bihar 
C. Purnea, Bihar 
D. Ranchi, Jharkhand 
E. Varanasi, Uttar Pradesh 

Key Point:
The National Makhana Board has been established at Purnea, Bihar, recognizing the region as a major hub for makhana (fox nut) production.