Crest or sail of float in Physalia is differently coloured. It is

Options

A. Yellow
B. Crimson
C. Violet
D. Black.

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the color of the crest or sail of the float in Physalia.

2. **Identify Physalia**: Physalia, commonly known as the Portuguese man of war, is a marine organism that is part of the plankton community. It is important to note that it is not a single organism but a colonial organism made up of specialized polyps and medusoids.

3. **Research the Color**: To answer the question, we need to determine the color of the crest or sail of Physalia.

4. **Analyze the Options**: The options given are:
- Option 1: Yellow
- Option 2: Crimson
- Option 3: Violet
- Option 4: Black

5. **Determine the Correct Answer**: Based on the information available, the crest or sail of Physalia is known to be crimson in color. Therefore, the correct answer is Option 2: Crimson.

6. **Conclusion**: The color of the crest or sail of the float in Physalia is crimson.