## **Core Concept**
The question tests knowledge on the life cycles of different Plasmodium species that cause malaria, specifically focusing on their ability to cause relapses. Relapse in malaria refers to the re-emergence of symptoms from parasites that have remained dormant in the liver.

## **Why the Correct Answer is Right**
Plasmodium vivax and Plasmodium ovale are known to cause relapses due to their unique life cycle. These parasites form **hypnozoites**, which are dormant liver stages. These hypnozoites can reactivate weeks, months, or even years after the initial infection, leading to a relapse of the disease. This characteristic distinguishes them from Plasmodium falciparum and Plasmodium malariae, which do not have a persistent liver stage and thus do not cause relapses in the same way.

## **Why Each Wrong Option is Incorrect**
- **Option A:** Plasmodium falciparum does not cause relapses because it does not have a dormant liver stage like hypnozoites; it causes recrudescence if the treatment is not adequate.
- **Option B:** This option might seem plausible but given that the correct answer involves species known for relapses, and without specific species listed, it's less directly relevant.
- **Option D:** Plasmodium malariae causes a chronic infection but does not have a dormant liver stage leading to relapses; instead, it can cause recrudescence.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **Plasmodium vivax and Plasmodium ovale** infections can remain dormant in the liver for extended periods, leading to relapses. This is critical for treatment, as primaquine is often used to clear these dormant stages and prevent relapses.

## **Correct Answer:** C.