This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Obstetric Care in RCH: Visits, IFA, TT, MCH Indicators, Subject name: Social & Preventive Medicine
[{'content': 'Vitamin K is given to every child at the age of :- \nSelect and explain. \nA. At bih, B. At 9 months age, C. At 5-6 years age, D. Not required in Indian babies', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Vitamin K: The role of Vitamin K is to stimulate the production and/or the release of ceain coagulation factors. In Vitamin K deficiency, prothrombin content of blood is markedly decreased & blood clotting time is considerably prolonged. Newborn infants tend to be deficient in vitamin K due to minimal stores of prothrombin at bih & lack of an established intestinal flora. Thus, soon after bih, all infants or those at increased risk should receive a single intramuscular dose of a Vitamin K preparation (0.1- 0.2 mg of menadione sodium bisulphite or 0.5 mg of vitamin K1) by way of prophylaxis.', 'role': 'assistant'}]