Study the following statements and identify the correct combination of statements:
Statements:
(A) Standard BOD (BOD of water during 5 days at 20∘C) is equal to about 67% of ultimate BOD (BODu).
(B) The first demand of BOD occurs due to the oxidation of organic matter in wastewater is also called nitrogenous demand.
(C) The dissolved oxygen in wastewater is determined by the Winkler method.
1
(A)-True, (B)-True, (C)-True.
2
(A)-True, (B)-True, (C)-False.
3
(A)-False, (B)-False, (C)-True.
4
(A)-True, (B)-False, (C)-True.