"Ray fungi' is the name given to:

Options

A. Mycoplasma
B. Cyanobacteria
C. Actinomycetes
D. Rickettsia

Answer

To answer the question "Ray fungi' is the name given to:", we will analyze the options provided and determine which one is correct.

### Step-by-Step Solution:

1. **Understanding the Term 'Ray Fungi':**
- The term 'Ray fungi' refers to a specific group of fungi known for their filamentous structure and branching pattern.

2. **Evaluating the Options:**
- **Option 1: Mycoplasma**
- Mycoplasma is a genus of bacteria that lack a cell wall. Therefore, this option is incorrect.
- **Option 2: Cyanobacteria**
- Cyanobacteria are photosynthetic bacteria that play a role in nitrogen fixation. This option is also incorrect.
- **Option 3: Escomycetes**
- Escomycetes, also known as Ascomycetes, are a group of fungi, but they are not referred to as 'Ray fungi.' However, the term 'Ray fungi' is often associated with Actinomycetes, which are filamentous prokaryotic organisms.
- **Option 4: Rickettsia**
- Rickettsia are a type of bacteria that are obligate intracellular parasites. This option is incorrect as well.

3. **Identifying the Correct Answer:**
- The correct answer is **Option 3: Actinomycetes**, as they are often referred to as 'Ray fungi' due to their filamentous and branching structure.

### Final Answer:
- **Ray fungi' is the name given to: Actinomycetes.**