Correct Answer: B

Rationale: The correct answer is 'Airborne.' Tuberculosis is mainly transmitted through the air via respiratory droplets when an infected person coughs or sneezes. This allows the bacteria to be inhaled by others and infect their lungs. It is important to implement infection control measures to prevent the spread of tuberculosis in healthcare settings and the community.

Correct Answer: B

Rationale: Physical inactivity is a major risk factor for cardiovascular diseases as it contributes to a sedentary lifestyle, leading to obesity, high blood pressure, and other cardiovascular issues. Regular physical activity helps maintain a healthy heart and reduces the risk of developing cardiovascular diseases.

Correct Answer: B

Rationale: The goal of the Safe Motherhood Initiative is to enhance maternal health by reducing maternal mortality and morbidity. This initiative focuses on improving the health outcomes of pregnant women and new mothers, ensuring safer pregnancies and childbirth experiences.

Correct Answer: C

Rationale: Vitamin K is administered to newborns primarily to prevent bleeding disorders. Newborns have low levels of Vitamin K at birth, which can lead to a condition called vitamin K deficiency bleeding (VKDB). Administering Vitamin K helps prevent this potentially life-threatening bleeding disorder.

Correct Answer: B

Rationale: A previous allergic reaction to the vaccine is a contraindication for the administration of live vaccines. This is because individuals who have had a previous allergic reaction to a vaccine are at higher risk of developing a severe allergic reaction with subsequent doses. It is crucial to identify and avoid administering live vaccines to individuals with a history of allergic reactions to prevent potential adverse events.