A common preservatives used in jam and pickles is
The correct option is A Sodium benzoate
Sodium benzoate is a preservative used in jams. Benzoic acid is absorbed into the cell that decreases the intracellular pH. Hence the anaerobic fermentation of glucose through phosphofructokinase decreases. This inhibits survival of microorganisms that cause food spoilage. Thus, the correct answer is option A.