## Core Concept
Toxoplasmosis is a parasitic infection caused by *Toxoplasma gondii*. The lifecycle of *T. gondii* involves two main types of cysts: oocysts and tissue cysts (also known as pseudocysts). Understanding the hosts in which these cysts are found is crucial for diagnosing and managing the infection.

## Why the Correct Answer is Right
Oocysts are excreted in the feces of infected cats, which are the definitive hosts for *T. gondii*. Tissue cysts (or pseudocysts) are found in the tissues of infected intermediate hosts, which can include humans, birds, and other animals. When humans ingest oocysts from contaminated cat feces or undercooked meat containing tissue cysts, they can become infected.

## Why Each Wrong Option is Incorrect
**Option A:** Incorrect because it does not accurately represent the hosts for oocysts and pseudocysts of *T. gondii*.
**Option B:** Incorrect as it misassigns the hosts for oocysts and pseudocysts.
**Option D:** Incorrect because it incorrectly identifies the hosts for both oocysts and pseudocysts.

## Clinical Pearl / High-Yield Fact
A key point to remember is that pregnant women and immunocompromised individuals are particularly susceptible to severe toxoplasmosis. Preventive measures include avoiding cat litter, thoroughly cooking meat, and washing hands after handling raw meat or soil.

## Correct Answer: C.
In Toxoplasmosis, the oocyst is seen in cats and the pseudocyst (tissue cyst) is seen in humans and other intermediate hosts.