Which of the following statements are correct regarding Deuteromycetes?
I. Deuteromycetes are called perfect fungi.
II. Members of Deutermycetes mycetes were often moved to ascomycetes or basidiomycetes once their sexual stages were studied.
III. Large number of (No Suggestions) are decomposers that help in nutrient cycling.
IV. Their mycelium is aseptate and unbranched.

Options

A. I , II and IV
B. II and III
C. III and IV
D. I , III and IV

Answer

To determine which statements regarding Deuteromycetes are correct, let's analyze each statement one by one.

### Step 1: Analyze Statement I
**Statement I:** Deuteromycetes are called perfect fungi.
**Analysis:** This statement is incorrect. Deuteromycetes are commonly referred to as "imperfect fungi" because they do not have a known sexual reproductive stage.

### Step 2: Analyze Statement II
**Statement II:** Members of Deuteromycetes were often moved to Ascomycetes or Basidiomycetes once their sexual stages were studied.
**Analysis:** This statement is correct. Many fungi that were classified as Deuteromycetes have been reclassified into Ascomycetes or Basidiomycetes after their sexual reproductive stages were identified.

### Step 3: Analyze Statement III
**Statement III:** A large number of Deuteromycetes are decomposers that help in nutrient cycling.
**Analysis:** This statement is also correct. Many Deuteromycetes play a crucial role in decomposition and nutrient cycling in ecosystems.

### Step 4: Analyze Statement IV
**Statement IV:** Their mycelium is aseptate and unbranched.
**Analysis:** This statement is incorrect. The mycelium of Deuteromycetes is typically septate (divided by septa) and can be branched.

### Conclusion
Based on the analysis:
- Statement I is incorrect.
- Statement II is correct.
- Statement III is correct.
- Statement IV is incorrect.

Thus, the correct statements regarding Deuteromycetes are II and III.

### Final Answer
The correct statements are:
- II and III.