Social & Preventive Medicine Recommended initial dose of Vitamin “A” for prophylaxis in a 9 month old child is: September 2008 A 4,00,000 I.U. B 5,00,000 I.U. C 1,00,000 I.U. D 2,00,000 I.U. 💡 Explanation Recommended initial dose of Vitamin "A" for prophylaxis in a 9 month old child is: September 2008 ✓ Correct Answer: C. 1,00,000 I.U.