कारखानों एवं वाहनों के द्वारा कौनसी हानिकारक गैस छोड़ी जाती है ? - Which harmful gas is released by factories and vehicles? - Kaarkhanon Aivam Wahanon Ke Dwara Kaunsi HaniKaarak Gas Chhodi Jati Hai ? General Science in hindi, Physics Nitrogen di Oxide question answers in hindi pdf Sulfur Dioxide questions in hindi, Know About Carbon Mono Oxide General Science online test General Science notes in hindi quiz book Carbon di Oxide
Right answer is option D