Question

In the Controlled Atmospheric Storage method of storage of grain food _____

A Food grains are exposed to 50-60˚C temp. for a shorter period
B Food grains are stored under airtight condition in an atmosphere of inert gases, CO2 (60%) or N (97-99%)
C Food grains are Exposed to low temperature below 20˚C
D Acoustic energy is used to kill insects in the food grains
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