Penis is present in

Options

A. Vulture
B. Pigeon
C. Cock
D. Duck

Answer

### Step-by-Step Solution

1. **Understanding the Question**: The question asks about the presence of a penis in certain animals. We need to identify which of the listed animals possess a penis.

2. **Identifying the Animals**: The animals mentioned are vulture, pigeon, cock (rooster), and duck. We need to analyze each of these animals to determine if they have a penis.

3. **Analyzing Each Animal**:
- **Vulture**: Vultures are birds and typically do not have a penis. They reproduce through cloacal copulation.
- **Pigeon**: Pigeons also do not have a penis. Like vultures, they reproduce through cloacal copulation.
- **Cock (Rooster)**: Roosters, which are male chickens, do not have a penis in the traditional sense. They also reproduce through cloacal copulation.
- **Duck**: Ducks are unique among birds in that males (drakes) possess a penis. This penis is usually retracted and enclosed in a sac, and it becomes erect during mating.

4. **Conclusion**: Among the animals listed, the duck is the only one that possesses a penis. Therefore, the correct answer is **duck**.