Answer: carbon monoxide, sulfur oxide, nitrogen oxide
Explanation:
Many types of gases like chlorine, sulfur dioxide, phosgene, hydrogen sulfide, nitrogen dioxide, and ammonia are the gases which causes respiratory problems. These gases causes irritation of the respiratory system and severely affects the function of lungs and heart.
Among the options given carbon monoxide, sulfur oxide and nitrogen oxide are the gases which may cause heart and respiratory problems.
The carbon monoxide will prevent the supply of oxygen through blood all over the body. High doses of carbon monoxide may cause asphyxia and even death.
Sulfur oxides can affect the function of the lungs. It can even worsen condition of asthma and patients of heart diseases.
Nitrogen oxides can decrease the lung function, and increases the risk of respiratory conditions.
