A) Malic acid
B) carbonic acid
C) Citric acid
D) lactic acid
Correct Answer: D
Solution :
[d] Lactic acid develops in cow's milk as a result of bacteria fermenting (breaking down) the lactose. Freshly expressed milk does not contain lactic acid. It is only after a short period of time that the concentration builds up due to the input of bacteria. Lactic acid is found primarily in sour milk products, such as koumiss, laban, yogurt, kefir, some cottage cheeses, and kombucha. The casein in fermented milk is coagulated (curdled) by lactic acid. Lactic acid is also responsible for the sour flavor of sourdough breads,
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