A marine mammal of order Carnivora is

Options

A. Otter
B. Walrus
C. Porpoise
D. Both B and C .

Answer

To solve the question "A marine mammal of order Carnivora is", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question is asking for a marine mammal that belongs to the order Carnivora. Carnivora includes animals that primarily eat meat.

2. **Identify the Options**: The options provided are:
- A) Otter
- B) Walrus
- C) Porpoise
- D) Both B and C

3. **Analyze Each Option**:
- **Otter**: Otters are indeed carnivorous, but they are primarily terrestrial (land) mammals, not marine mammals. Therefore, this option is incorrect.
- **Walrus**: Walruses are large marine mammals that belong to the order Carnivora. They are found in marine environments and are carnivorous, primarily feeding on marine invertebrates.
- **Porpoise**: Porpoises are also marine mammals and belong to the order Carnivora. They are carnivorous, feeding on fish and other marine organisms.

4. **Determine the Correct Answer**: Since both walrus and porpoise are marine mammals that belong to the order Carnivora, the correct answer is both B and C.

5. **Final Conclusion**: The correct option is D) Both B and C.