Correct Answer: B

Rationale: The correct answer is B, the Letter of Instruction No. 949. This instruction was issued by then President Ferdinand Marcos, directing the Ministry of Health (now the Department of Health) to utilize the Primary Health Care approach in planning and implementing health programs. This legal basis established the foundation for implementing Primary Health Care in the Philippines, aligning with the global Alma Ata Declaration's principles.

Correct Answer: C

Rationale: The correct term for the method of population assignment based on the actual physical location of the people is 'de facto.' On the other hand, 'de jure' is the method based on the usual place of residence of the people.

Correct Answer: A

Rationale: The correct interval between doses of tetanus toxoid for pregnant women is 4 weeks. This interval ensures that pregnant women receive adequate protection against tetanus, particularly in areas where the disease is prevalent. The 4-week interval helps in building and maintaining immunity to protect both the pregnant woman and her developing baby from tetanus infection.

Correct Answer: A

Rationale: In traditional Chinese medicine, the force characterized by yielding, negative, and feminine aspects is referred to as Yin. Yin is associated with qualities such as darkness, passivity, cold, and intuition. On the other hand, Yang represents the male, dominating, positive, and masculine force associated with light, activity, heat, and logic. Qi is the vital energy that flows through the body, and Chai is not a term used in traditional Chinese medicine for these forces.

Correct Answer: A

Rationale: Iron supplementation is essential for pregnant women to prevent anemia, which can have adverse effects on both the mother and the developing fetus. Anemia in pregnancy can lead to fatigue, weakness, and even complications such as preterm birth or low birth weight. Therefore, ensuring an adequate supply of iron through supplementation is crucial to support the increased demands during pregnancy and prevent deficiencies that could negatively impact the health of both the mother and the baby.