In slime moulds :-
(a) The main body is wall less
(b) True wall is found around spores
(c) Spores are dispersed by water
(d) Saprophytes are not common

Options

A. a, b are correct
B. a, c are correct
C. b, d are correct
D. a, d correct

Answer

To determine which statements about slime moulds are true, let's analyze each option step by step:

### Step 1: Analyze Statement (a)
**Statement (a): The main body is wall-less.**
- Slime moulds are known for their unique structure. They do not have a rigid cell wall like plants. Instead, their main body is a protoplasmic mass that is wall-less.
- **Conclusion:** This statement is **true**.

### Step 2: Analyze Statement (b)
**Statement (b): True wall is found around spores.**
- In slime moulds, during reproduction, spores are formed, and these spores do have a true wall. This is a characteristic feature of the reproductive phase of slime moulds.
- **Conclusion:** This statement is **true**.

### Step 3: Analyze Statement (c)
**Statement (c): Spores are dispersed by water.**
- Spores of slime moulds are typically lightweight and are dispersed by the wind rather than water. This is a common characteristic of their reproductive strategy.
- **Conclusion:** This statement is **false**.

### Step 4: Analyze Statement (d)
**Statement (d): Saprophytes are not common.**
- Slime moulds are primarily saprophytic organisms, meaning they obtain their nutrients from decaying organic matter. This mode of nutrition is quite common among slime moulds.
- **Conclusion:** This statement is **false**.

### Final Conclusion:
- The true statements are (a) and (b). Therefore, the correct answer is that both statements (a) and (b) are true.

---