Vinegar is present in acetic acid. Curd contains ……….acid.A.Lactic acidB.Tartaric acidC.Citric acidD.None of these

Curd primarily contains lactic acid. Here's the breakdown:

Explanation:
Curd Formation: Curd is made through the fermentation of milk by specific bacteria, mainly Lactobacillus. During this process, these bacteria convert lactose (the sugar found in milk) into lactic acid.

Acid Content: The production of lactic acid is what gives curd its characteristic tangy taste and slightly acidic pH.

Options Analysis:
A. Lactic acid: This is the correct answer as curd contains lactic acid.
B. Tartaric acid: This acid is found in grapes and is commonly associated with wine and cream of tartar, not curd.
C. Citric acid: This acid is primarily found in citrus fruits and is not the main acid present in curd.
D. None of these: Incorrect, as lactic acid is indeed present in curd.
Thus, the answer is A. Lactic acid.