'CA storages' are based on which system?

Correct option is B

· Correct answer: (b) Reduce the O2 and increase the CO2 concentration
· Controlled Atmosphere (CA) storages are designed to control the oxygen and carbon dioxide levels to slow down the respiration of stored fruits and vegetables, extending their shelf life.
Other options:
· (a) Increase the O2 and reduce the CO2 concentration: This would not slow down respiration; it may lead to spoilage instead.
· (c) Increase the Nitrogen and O2 concentration: Increasing oxygen levels may not be suitable for storage, as it would speed up the ripening process.
· (d) Increase the sulphur oxide and decrease CO2: Sulfur dioxide is used for fumigation, not as part of controlled atmosphere storage.