Answer: Vitamin C.
- A Vitamin A
- B Vitamin B12
- C Vitamin C
- D Vitamin D
Correct answer: C. Vitamin C
Explanation: Scurvy is caused by Vitamin C (ascorbic acid) deficiency. Vitamin C is essential for collagen synthesis. Deficiency causes bleeding gums, poor wound healing, and joint pain. Historically affected sailors on long voyages.
The Plasmodium parasite needs both hosts: the female Anopheles mosquito injects sporozoites while biting (infecting the human liver and RBCs, causing the malaria fever cycle), then picks up gametocytes from an infected person's blood, completing the parasite's sexual stage inside the mosquito.
Concept context
Pathogens, infectious diseases, non-infectious diseases, drugs, cancer, and public health. High NEET importance.