UPSC Civil Services 2019 Prelims General Studies Paper I

- Compared to conventional CNG, use of H-CNG can reduce emissions of carbon monoxide up to 70% so #1 is wrong, because it doesn't 'eliminate CO emission'.
- Same Indian Express article reads: For consumers who pay Rs 42 per kg for CNG, the cost of H-CNG would not be more than Rs 43 per kg. NITI Aayog-CII Action Plan for Clean Fuel notes that physical blending of CNG and hydrogen involves a series of energyintensive steps that would make H-CNG more expensive than CNG. So, #4 is wrong. By elimination we are left with answer B: only 2 and 3.