Answer: Option B
:
B
First, barley seeds are allowed to germinate and then dried in a kiln before being crushed to a smooth powder in a mill. This powder is then mixed with water and hops in a large kettle. This process is called as brewing. Thereafter, the ground barley-hops mixture is added to a fermentor along with yeast. A constant temperature between 8 - 25 degrees is maintained, depending on the type of beer being made. Yeast acts on the sugars of the barley seeds and converts it to ethanol and $C{O}_2$. The $C{O}_2$ is extracted and stored for later use while excess yeast is removed and the mixture, which is now called green beer, is allowed to mature and develop a distinct flavor. After maturation, the liquid is filtered and pasteurized and $C{O}_2$ that was extracted earlier is pumped back in to give beer the fizzy taste. Finally, the finished product is bottled and sold for consumption.