The right answer is CO2.
The degradation of glucose is either by respiration or by fermentation. In breathing we have a release of CO2.
Respiration refers to both gaseous exchange resulting from inhalation and expiration of the air (CO2 carbon dioxide release and oxygen O2 absorption) and cellular respiration that allows, by degrading glucose through oxygen , to obtain energy.
Dorothy Mary Crowfoot Hodgkin was the first to develop protein crystallography and she won Nobel Prize for that discovery ( third woman to win the Nobel Prize in Chemistry). Hodgkin confirmed the structure of penicillin but also realized the structure of vitamin B12 by x-ray crystallography analysis. She advanced the classical technique of X-ray crystallography.
I Think That will be crime scene drawing