Carbon exists in the atmosphere in the form of

Explanation:

Carbon exists in the atmosphere primarily in two forms:

1. Carbon Dioxide (CO₂):
   • It is present in large quantities and plays a vital role in the Earth's carbon cycle. It is released through processes such as respiration, combustion of fossil fuels, volcanic activity, and decomposition of organic matter.
   • CO₂ is a major greenhouse gas that contributes to global warming.
2. Carbon Monoxide (CO):
   • Present only in trace amounts, carbon monoxide is produced mainly through incomplete combustion of fossil fuels, wildfires, and some industrial processes.
   • It is highly toxic and has a short lifespan in the atmosphere, as it reacts with other compounds.

Coal is not present in the atmosphere; it is a solid form of carbon found underground and used as a fuel source.

Thus, the atmosphere contains large quantities of carbon dioxide and traces of carbon monoxide.

The correct answer is: d. Carbon monoxide in traces and carbon dioxide is in large quantity.