For the COD test of sewage, organic matter is oxidised by K‚Äö√á√áCr‚Äö√á√áO‚Äö√á√° in the presence of$?

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For the COD test of sewage, organic matter is oxidised by K‚Äö√�

1.	For the COD test of sewage, organic matter is oxidised by K‚Äö√á√áCr‚Äö√á√áO‚Äö√á√° in the presence of$?
A.	H‚Äö√á√áSO‚Äö√á√ë
B.	HNO‚Äö√á√â
C.	HCl
D.	None of these
Answer» B. HNO‚Äö√á√â