Which of the following are NOT energy reserves?

A) lipid inclusions

B) polysaccharide granules

C) carboxysomes

D) metachromatic granules

E) sulfur granules

The correct answer is C) carboxysomes

Carboxysomes are polyhedral inclusion bodies that contain enzyme ribulose - 1,5-bisphosphate carboxylase/oxygenase (RuBisCO). This is responsible for the fixation of carbon dioxide in cyanobacteria. Carboxysomes have evolved as a consequence of the increase in oxygen concentration in the ancient atmosphere.

Thus, carboxysomes are not energy reserves, unlike another offered answers.