Correct Answer: B

Rationale: The correct answer is B: Liver cancer. The Hepatitis B vaccine helps prevent liver cancer by preventing chronic Hepatitis B infection. While Hepatitis B infection can lead to jaundice, the primary goal of the vaccine is to prevent liver complications such as cirrhosis and liver cancer.

Correct Answer: A

Rationale: The correct answer is A: Crude birth rate. Natality refers to birth, making the crude birth rate a measure of the number of live births in a given population over a specific period of time. It is an essential indicator in demography and public health to understand population dynamics.

Correct Answer: D

Rationale: According to R.A. 3753, any birth attendant, including public health nurses, rural health midwives, and municipal health officers, may sign the certificate of live birth. This law allows a range of health professionals involved in childbirth to be authorized to sign birth certificates, ensuring accessibility and convenience for parents.

Correct Answer: D

Rationale: Intersectoral linkages involve collaborations between the health sector and other sectors for community development. In this scenario, cooperation between a public health nurse (PHN) and a public school teacher exemplifies intersectoral linkages, as it represents a partnership between the health and education sectors.

Correct Answer: B

Rationale: Children with measles are given vitamin A to prevent complications, such as blindness. Vitamin A supplementation is crucial in reducing the severity and risk of complications associated with measles, particularly in populations with vitamin A deficiency.