Which of the following are uricotelic animals`:`
(a) Rohu and frog
(b) Lizard and crow
(c) Camel and frog
(d) Earthworm and eagle

Options

A. Rohu and frog
B. Lizard and crow
C. Camel and frog
D. Earthworm and eagle

Answer

To determine which of the following options contains uricotelic animals, we first need to understand what uricotelic organisms are. Uricotelic animals are those that excrete nitrogenous waste primarily in the form of uric acid. This adaptation is particularly common among certain groups of animals, including reptiles and birds.

Now, let's analyze each option:

1. **Option A: Rohu and Frog**
- Rohu (a type of fish) primarily excretes ammonia.
- Frog (an amphibian) typically excretes urea.
- **Conclusion**: Neither are uricotelic.

2. **Option B: Lizard and Crow**
- Lizard (a reptile) excretes uric acid.
- Crow (a bird) also excretes uric acid.
- **Conclusion**: Both are uricotelic.

3. **Option C: Camel and Frog**
- Camel (a mammal) primarily excretes urea.
- Frog (an amphibian) typically excretes urea.
- **Conclusion**: Neither are uricotelic.

4. **Option D: Earthworm and Eagle**
- Earthworm (an annelid) excretes ammonia.
- Eagle (a bird) excretes uric acid.
- **Conclusion**: Only the eagle is uricotelic.

Based on this analysis, the correct answer is **Option B: Lizard and Crow**, as both of these animals are uricotelic.

### Step-by-Step Solution:
1. **Understand Uricotelism**: Recognize that uricotelic animals excrete uric acid as their nitrogenous waste.
2. **Analyze Each Option**:
- **Option A**: Rohu and Frog - Neither are uricotelic.
- **Option B**: Lizard and Crow - Both are uricotelic.
- **Option C**: Camel and Frog - Neither are uricotelic.
- **Option D**: Earthworm and Eagle - Only the eagle is uricotelic.
3. **Select the Correct Option**: Based on the analysis, the correct option is B (Lizard and Crow).