The green scum seen in the freshwater bodies is

Options

A. blue green algae
B. red algea
C. green algae
D. Both (b) and ( c)

Explanation

**Step-by-Step Solution:**

1. **Identify the Green Scum**: The green scum seen in freshwater bodies is primarily caused by the presence of certain types of algae.

2. **Types of Algae**: The two main types of algae responsible for this green scum are:
- **Blue-green algae**: Also known as cyanobacteria, these are photosynthetic bacteria that can form blooms in nutrient-rich waters.
- **Green algae**: These contain chlorophyll, which gives them their green color.

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