Which of the following are some important pollutants release

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Which of the following are some important pollutants released by steel industry in India?

1. Oxides of sulphur

2. Oxide of nitrogen

3. Carbon monoxide

4. Carbon dioxide

Select the correct answer using the code given below.

(a) 1, 3 and 4 only

(b) 2 and 3 only

(c) 1 and 4 only

(d) 1, 2, 3 and 4 only

???? ??? ?????? ?????? ?????? ???? ??? ?? ??? ?????????? ??????? ?????????? ??? ?? ??? ????

1. ????? ?? ???????

2. ????????? ?? ???????

3. ?????? ???????????

4. ?????? ??????????

???? ??? ?? ??? ?? ????? ???? ??? ????? ??????

(?) ???? ?, ? ?? ?

(b) ? ?? ? ??

(c) ???? 1 ?? 4

(d) ???? 1, 2, 3 ?? 4

[Ecology and Environment 2011-16-(1)]

A

B

C

D

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