What's the role of oxygen in cellular respiration?

A.

It accepts electrons and keeps the electron transport chain running.

B.

It breaks down carbon-based sugar molecules to release energy and forms carbon dioxide.

C. It combines with hydrogen lons in sugar molecules to release energy and form water.

D.

It supplies electrons to the electron transport chain to keep it running.

The correct statement is Option C. It combines with hydrogen lons in sugar molecules to release energy and form water.

Explanation:

Respiration is energy releasing process. During respiration, sugar molecule (glucose) is combined with oxygen and broken down into carbondioxode, water and energy in the form of Adenine tri phosphate (ATP). In respiration, oxygen combines with hydrogen ions in sugar molecules to emit energy and form water.