সঠিক উত্তর হচ্ছে: সালফার ডাই অক্সাইড
ব্যাখ্যা: Diesel fuel, also called diesel oil, combustible liquid used as fuel for diesel engines, ordinarily obtained from fractions of crude oil that are less volatile than the fractions used in gasoline. Sulfur is a critical polluting component of diesel and has been the object of much regulation. Traditional “regular” grades of diesel fuel contained as much as 5,000 parts per million (ppm) by weight sulfur. Source: britannica.com