Correct option is A
The correct answer is Vinegar, lemon juice, gastric juice, curd.
Vinegar, lemon juice, gastric juice, and curd are all acidic substances. Vinegar is a solution of acetic acid in water. Lemon juice is a solution of citric acid in water. Gastric juice is a solution of hydrochloric acid in water. Curd is a dairy product that is high in lactic acid.