<prompt> Single massive does of vitamin A for preventing the deficiency in preschool children between the age of 1-6 years for every 6 months is2,000 IU20,000 IU2,00,000 IU20,00,000 IU  <response>: Ans. c 2, 00,000 IU Ref. Park PSM 22nd 571Rx of VITAMIN A DEFICIENCY Since vitamin A can be stored in the body for 6-9 months and liberated slowly, a short-term, simple technology had been evolved by National institute of Nutrition, Hyderabad, for community-based intervention against the nutritional blindness, which has subsequently been adopted by other counties. The strategy is to administer a single massive dose of 2,00,000 IU of vitamin A in oil retinol palmitate orally every 6 months to preschool children 1-6 years old and half that dose 1,00,000 IU to children between 6 months and one year of age. 