<prompt> The preservative of choice in this poisoning:Rectified spiritSaturated solution of sodium chlorideFormalinSodium flouride  <response>: The most commonly used preservative for viscera is saturated solution of common salt NaCl because It is easily available, cheap and effective preservative. However, the best preservative for preservation of viscera is rectified spirit. z In cases of suspected alkali or acid poisoning except carbolic acid, only rectified spirit is used. 