Select the unpaired structure in male.

Options

A. Epididymis
B. Ejaculatory duct
C. Urethra
D. Vas deferens

Answer

To solve the question of selecting the unpaired structure in the male reproductive system, we will analyze each of the given options step by step.

### Step 1: Understand the Options
We have the following options to consider:
1. Epididymis
2. Ejaculatory Duct
3. Urethra
4. Vas Deferens

### Step 2: Identify the Structures
- **Epididymis**: This is a coiled tube that is attached to the back of each testis. There are two epididymides (one for each testis), making it a paired structure.

- **Ejaculatory Duct**: This duct is formed by the merging of the vas deferens and the seminal vesicle duct. There are two ejaculatory ducts (one from each side), so it is also a paired structure.

- **Urethra**: This is a single tube that runs through the penis and serves the dual purpose of transporting urine and semen. It is the only unpaired structure among the options.

- **Vas Deferens**: This is a muscular tube that transports sperm from the epididymis to the ejaculatory duct. There are two vas deferens (one for each side), making it a paired structure.

### Step 3: Conclusion
From the analysis, we can conclude that the **Urethra** is the only unpaired structure in the male reproductive system.

### Final Answer
The unpaired structure in males is the **Urethra** (Option C).

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