In February 2020, how many polluted river stretches, based on Biochemical Oxygen Demand (BOD) in different northeastern states, have been identified by the Central Pollution Board?

In February 2020, how many polluted river stretches, based on Biochemi

1.	In February 2020, how many polluted river stretches, based on Biochemical Oxygen Demand (BOD) in different northeastern states, have been identified by the Central Pollution Board?
A.	40
B.	50
C.	60
D.	70
E.	80
Answer» D. 70