Which of the following is responsible for causing "Toxoplasmosis' as an opportunistic infection in individuals suffering from AIDS?

Options

A. (a) Bacteria
B. (b) Virus
C. (c) Fungi
D. (d) Protozoa

Answer

To solve the question regarding the causative agent of "Toxoplasmosis" as an opportunistic infection in individuals suffering from AIDS, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding AIDS**:
- AIDS (Acquired Immunodeficiency Syndrome) is caused by the Human Immunodeficiency Virus (HIV), which primarily attacks the immune system, leading to immunocompromised conditions.

2. **Identifying Opportunistic Infections**:
- In individuals with weakened immune systems, such as those with AIDS, opportunistic infections can occur. These infections are typically caused by pathogens that do not usually cause disease in healthy individuals.

3. **Recognizing Toxoplasmosis**:
- Toxoplasmosis is one such opportunistic infection that can severely affect individuals with AIDS.

4. **Identifying the Causative Agent**:
- The causative agent of Toxoplasmosis is a protozoan known as *Toxoplasma gondii*. This organism is a coccidian protozoan, which means it has a specific shape and life cycle that allows it to act as an internal parasite.

5. **Evaluating the Options**:
- The question provides multiple-choice options:
- a) Bacteria
- b) Virus
- c) Fungi
- d) Protozoa
- Since *Toxoplasma gondii* is a protozoan, the correct answer is option d) Protozoa.

### Final Answer:
- The correct answer is **d) Protozoa**.