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In the context of proposals to the use of hydrogen-enriched CNG (H-CNG) as fuel for buses in public transport, consider the following statements:

  1. The main advantage of the use of H- CNG is the elimination of carbon monoxide emissions.

  2. H-CNG as fuel reduces carbon dioxide and hydrocarbon emissions.

  3. Hydrogen up to one-fifth by volume can be blended with CNG as fuel for buses.

  4. H-CNG makes the fuel less expensive than CNG.

????????? ?????? ??? ???? ?? ??? ???? ?? ??? ??? ?????????-?????? ?????? (??-??????) ?? ????? ?? ?????????? ?? ?????? ???, ?????????? ????? ?? ????? ????:

  1. ??- ?????? ?? ????? ?? ????? ??? ?????? ??????????? ???????? ?? ??????? ???

  2. ???? ?? ??? ??? ??-?????? ?????? ?????????? ?? ????????????? ???????? ?? ?? ???? ???

  3. ?????? ?? ????? ?? ??-??????? ?? ?? ????????? ?? ???? ?? ???? ?? ??? ??? ?????? ?? ??? ??????? ???? ?? ???? ???

  4. ??-?????? ???? ?? ?????? ?? ?? ????? ????? ???

Which of the statements given above is/are correct?

??? ??? ?? ????? ??? ?? ??? ?? ??? ?? / ????

[UPSC 2019 2 JUNE]
A
B
C
D

EXPLANATION

HCNG reduces emissions of Carbon Monoxide up to 70% but does not eliminate it. I...
HCNG 70% ?? ?????? ??????????? ?? ???????? ?? ?? ???? ?? ????? ??? ?????? ???? ?...
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