Explanation:

The trace gas which is produced in rice paddy and is associated with global warming is Methane.
Global warming is the gradual heating of Earth's surface, oceans and atmosphere.
Methane is a chemical compound with the chemical formula CH4. It is a group 14 hydride and the simplest alkane, and is the main constituent of natural gas.Fourth option is correct. Carbon Monoxide is produced in rice/paddy cultivation and is associated with global warming.